Messi Barcelona career in season 2011 - 2012

Messi started the season by lifting the Spanish Supercup with Barcelona, scoring three goals and providing two assists in a 5–4 aggregate win against Real Madrid. His vital interventions continued in the next official match played against Porto when he scored again following a weak back pass from Fredy Guarín before setting up Cesc Fàbregas to give Barcelona a 2–0 victory and the UEFA Super Cup, then the only official competition that remained for him to score in.

After scoring his first goal of an eventual hat-trick in an 8–0 rout against CA Osasuna, Messi produced a special celebration for Soufian, a 10-year-old Moroccan boy with Laurin Sandrow syndrome, a rare medical condition that can eventually lead to the loss of the lower extremities. Whilst Messi usually points to the sky after scoring a goal, Messi slapped his thighs as a dedication to Soufian.

In August, Messi became the second highest goalscorer surpassing László Kubala on 194 goals, being behind only to César Rodríguez on 232 goals in all official competitions.

On 28 September, Messi scored his first two Champions League goals of the season against BATE Borisov, becoming Barcelona's second highest goalscorer in its history, tying László Kubala, at 194 goals in all official competitions. He surpassed that record when he scored two goals against Racing Santander. He became second in Barcelona's La Liga goalscorers list with 132 goals, one more than Kubala. He scored his 200th Barcelona goal and two more as part of a hat-trick in his next game against Viktoria Plzeň in the Champions League.

Messi scored a brace in the Club World Cup Final against Santos FC and was recognized as the man of the match and also awarded the Golden Ball for his performance during the tournament.

Messi won the 2011 UEFA Best Player in Europe Award, beating his FC Barcelona team-mate Xavi Hernández and Real Madrid's Cristiano Ronaldo. Messi won the 2011 FIFA Ballon d'Or, again beating his team-mate Xavi and Cristiano Ronaldo. By winning the FIFA Ballon d'Or again, Messi become the fourth player to win three Ballon d'Ors, after Johan Cruyff, Michel Platini and Marco Van Basten and the second player to win three consecutive Ballon d'Ors, after Michel Platini (although two of his Ballon d'Ors are FIFA Ballon d'Ors, which he won consecutively).

On 19 February 2012, Messi, on his 200th La Liga appearance, scored four goals against Valencia CF in a 5–1 win. On 7 March, Messi became the first player to score five goals in an UEFA Champions League match since the tournament's re-establishment in 1992, helping the defending champions Barcelona win 7–1 against Bayer Leverkusen.

On 20 March, Messi scored three goals against Granada CF, making him FC Barcelona's leading goalscorer in official competitions, surpassing club legend César Rodríguez, who had previously held the record with 232.

On 3 April, Messi scored two goals from penalty kicks against Milan in the second leg of the Champions League Quarter-final, allowing him to surpass his personal record, joint with Ruud van Nistelrooy, of 12 goals in a single UEFA Champions League season. These goals allowed him to tie José Altafini's record of 14 goals in a single European Cup season in the 1962–63 season, before the tournament's re-establishment as the UEFA Champions League in 1992. Barcelona were knocked out in the semi-finals to eventual winners Chelsea.

On 11 April, Messi scored his 61th goal against Getafe CF, surpassing Isidro Langara's record of 60 goals in 1933–34, and became the best goalscorer in history in one season in Spain.

On 2 May, Messi scored a hat-trick against Málaga CF surpassing Gerd Müller's record (67 goals in 1972-73) with 68 goals, and thus becoming the best goalscorer in history in one season in Europe. It was the 21st multi-goal game of the season for Messi and his seventh La Liga hat-trick. He then scored four goals on 5 May against RCD Espanyol to take his tally to an unprecedented 72 goals, in the process becoming only the second player to pass 70 goals in a first division season since Archie Stark of Bethlehem Steel in the American Soccer League in 1924–25.

On 25 May, he scored again in the 2012 Copa del Rey Final, helping Barcelona win their 26th Spanish Cup title, and increasing his seasonal goalscoring record to an unmatched 73 goals in all competitions. This was also Guardiola's last match as Barcelona's manager, and the Cup win marked Messi's second Copa del Rey title, after losing the final the year before, as well as his 14th Barcelona trophy during Guardiola's four seasons at the club. Although Barcelona failed to win their 4th consecutive Liga title under Guardiola, finishing runners up to arch-rivals Real Madrid, Messi finished the 2011–12 season as the top goalscorer in La Liga for a second time, with a Liga record of 50 goals. He was the second best assist provider in La Liga that season with 16 assists, after Mesut Özil, who managed 17. He also ended the season as the UEFA Champions' League Top Scorer for a fourth consecutive time, with 14 goals. He was one of the top assist providers of the tournament with 5 assists and finished the season with 73 goals and 29 assists in all club competitions, with more goals and assists than any other player.

Messi Barcelona career in season 2009 - 2010

After winning the 2009 UEFA Super Cup, Barcelona manager Pep Guardiola asserted that Messi was probably the best player he had ever seen. This would also be the season in which Guardiola would first move Messi from the position of right winger into his now iconic "false-9" role in the centre of the front line at Barcelona. On 18 September, Messi signed a new contract with Barcelona, running until 2016 and with a buy-out clause of €250 million included, making Messi, along with Zlatan Ibrahimović, the highest paid players in La Liga, with earnings of around €9.5 million yearly.

Messi was named winner of the 2009 Ballon d'Or on 1 December 2009, beating runner-up Cristiano Ronaldo by largest ever margin of 473 to 233.

On 19 December, Messi scored the winner in the final of the 2009 Club World Cup against Estudiantes in Abu Dhabi, giving the club their sixth title of the year. Two days later, he was given the FIFA World Player of the Year award, beating Cristiano Ronaldo, Xavi, Kaká and Andrés Iniesta to the award. This was the first time he had won the award, and he became the first Argentinian to ever receive this honour. On 10 January 2010, Messi scored his first hat-trick in 2010 and his first hat-trick of the season against CD Tenerife in the 0–5 victory, and on 17 January he scored his 100th goal for the club in the 4–0 victory over Sevilla FC.

Messi scored a hat-trick against Valencia CF in a 3–0 home win, and finally he scored another hat-trick against Real Zaragoza in a 4–2 away win, becoming the first Barcelona player to score back-to-back hat-tricks in La Liga. He played his 200th official match for Barcelona against CA Osasuna on 24 March 2010.

On 6 April 2010, for the first time in Messi's career he scored four goals in a single match, netting the lot in a 4–1 home win over Arsenal in the Champions League quarter-final second leg. This also saw him overtake Rivaldo as Barcelona's all time greatest scorer in the competition. In the final league match of the season against Valladolid, he scored two goals in the second half to tie Ronaldo's club record of 34 goals in a single league season, set in 1996–97, and to finish four goals behind the all-time record held by Telmo Zarra. He was named La Liga player of the year for the second year in a row on 3 June 2010. He finished the season with 47 goals in all competitions, tying Ronaldo's record from the 1996-97 season, and he provided 11 assists.

Messi Barcelona career in season 2008 - 2009

Upon Ronaldinho's departure from the club, Messi inherited his number 10 jersey. During this season he placed second in the 2008 FIFA World Player of the Year awards with 678 points.

Messi scored his first hat-trick of 2009 in a Copa del Rey tie against Atlético Madrid which Barcelona won 3–1. Messi scored another important double on 1 February 2009, coming on as a second half substitute to help Barcelona defeat Racing Santander 1–2 after being 1–0 down. The second of the two strikes was Barcelona's 5000th league goal. On 8 April 2009, he scored twice against Bayern Munich in the Champions League, setting a personal record of eight goals in the competition.

As Barcelona's season was drawing to a close, Messi scored twice (his 35th and 36th goals in all competitions) to cap a 6–2 win over Real Madrid at the Santiago Bernabéu in what was Real's heaviest defeat since 1930. He won his first Copa del Rey on 13 May, scoring one goal and assisting another two, in a 4–1 victory over Athletic Bilbao. He helped his team win the double by winning La Liga. On 27 May he helped Barcelona win the Champions League by scoring a second goal in the 70th minute giving Barcelona a two goal lead; he also became the top scorer in the Champions League, the youngest in the tournament's history, with nine goals. Messi also won the UEFA Club Forward of the Year: and the UEFA Club Footballer of the Year rounding off a spectacular year in Europe. This victory meant Barcelona had won the Copa del Rey, La Liga and Champions League in the one season, and was the first time a Spanish club had ever won the treble. Messi finished the season with 38 goals and 18 assists in all competitions.

Messi Barcelona career in season 2007 - 2008

On 27 February, Messi played in his 100th official match for Barcelona against Valencia CF.

Messi was nominated for a FIFPro World XI Player Award under the category of Forward. A poll conducted in the online edition of the Spanish newspaper Marca had him as the best player in the world with 77 percent of the vote. Columnists from Barcelona-based newspapers El Mundo Deportivo and Sport stated that the Ballon d'Or should be given to Messi, a view supported by Franz Beckenbauer. Football personalities such as Francesco Totti have declared that they consider Messi to be one of the current best footballers in the world.

Messi was sidelined for six weeks following an injury on 4 March when he suffered a muscle tear in his left thigh during a Champions League match against Celtic FC. It was the fourth time in three seasons that Messi suffered this type of injury. Barcelona were knocked out of the Champions League in the semi-finals, to the eventual winners Manchester United. When the season was over Messi managed to score 16 goals and assisted 13 times in all competitions.

Messi Barcelona career in season 2005 - 2006

On 16 September, for the second time in three months, Barcelona announced an update to Messi's contract; this time it was improved to pay him as a first team member and extended until June 2014. Messi obtained Spanish citizenship on 26 September 2005 and was finally able to make his debut in the season's Spanish First Division. Messi's first home outing in the Champions League came on 27 September against Italian club Udinese. Fans at Barcelona's stadium, the Camp Nou, gave Messi a standing ovation upon his substitution, as his composure on the ball and passing combinations with Ronaldinho had paid dividends for Barcelona.

Messi netted six goals in 17 league appearances, and scored one Champions League goal in six. His season ended prematurely on 7 March 2006, however, when he suffered a muscle tear in his right thigh during the second leg of the second round Champions League tie against Chelsea. Rijkaard's Barcelona ended the season as champions of Spain and Europe.