Title: Lionel Messi
Content:  league debut during the next match on 16 October, against Espanyol, coming on in the 82nd minute. At 17 years, three months, and 22 days old, he was at the time the youngest player to represent Barcelona in an official competition. As a substitute player, he played 244 minutes in nine matches for the first team that season, including his debut in the UEFA Champions League against Shakhtar Donetsk. He scored his first senior goal on 1 May 2005, against Albacete, from an assist by Ronaldinho, becoming – at that time – the youngest-ever scorer for the club. Barcelona, in their second season under Rijkaard, won the league for the first time in six years.
Title: Lionel Messi
Content:  on 2 May 2009, however, he played for the first time as a false nine, positioned as a centre-forward but dropping deep into midfield to link up with Xavi and Andrés Iniesta. He set up his side's first goal and scored twice to end the match in an emphatic 6–2 victory, the team's greatest-ever score at Real Madrid's Santiago Bernabéu Stadium. Returning to the wing, he played his first final since breaking into the first team on 13 May, scoring once and assisting a second goal as Barcelona defeated Athletic Bilbao 4–1 to win the Copa del Rey. With 23 league goals from Messi that season, Barcelona became La Liga champions three days later and achieved its fifth double. As 
Title: Lionel Messi
Content:  all over the place to avoid being ridiculed by this kid, he just got up and kept on playing. He would dribble past four players and score a goal. Even the team's starting centre-backs were nervous. He was an alien." At 16 years, four months, and 23 days old, Messi made his first team debut when he came on in the 75th minute during a friendly against José Mourinho's Porto on 16 November 2003. His performance, creating two chances and a shot on goal, impressed the technical staff, and he subsequently began training daily with the club's reserve side, Barcelona B, as well as weekly with the first team. After his first training session with 
Title: Lionel Messi
Content:  quarter-finals since 2013. On 27 April, Messi came off the bench and scored the only goal in a 1–0 home win over Levante, which allowed Barcelona to clinch the league title; this was his 450th La Liga appearance, and his first league title as Barcelona's captain. On 1 May, Messi scored twice in a 3–0 home win over Liverpool in the first leg of the Champions League semi-finals; his second goal of the match, a 35-yard free kick, was the 600th senior club goal of his career, all of which had been scored with Barcelona. In the return leg six days later at Anfield, Barcelona suffered a 4–0 away defeat, which saw Liverpool advance to 
Title: Lionel Messi
Content:  On 24 June, his 18th birthday, Messi signed his first contract as a senior team player. It made him a Barcelona player until 2010, two years less than his previous contract, but his buyout clause increased to €150 million. His breakthrough came two months later, on 24 August, during the Joan Gamper Trophy, Barcelona's pre-season competition. A starter for the first time, he gave a well-received performance against Fabio Capello's Juventus, receiving an ovation from the Camp Nou. While Capello requested to loan Messi, a bid to buy him came from Inter Milan, who were willing to pay his €150 million buyout 
Title: Lionel Messi
Content:  With the departure of former captain Andrés Iniesta in May 2018, Messi was named the team's new captain for the following season. On 12 August, he lifted his first title as Barcelona's captain, the Supercopa de España, following a 2–1 victory over Sevilla. On 19 August, Messi scored twice in helping Barcelona defeat Alavés 3–0 in their first La Liga match of the season, with his first goal, a free kick that he rolled under the jumping Alavés wall, making history in being Barcelona's 6000th goal in La Liga. On 18 September, Messi scored a hat-trick in a 4–0 home win over PSV Eindhoven in Barcelona's opening Champions League group stage match of the season, setting 
Title: Lionel Messi
Content:  Lyon. On 28 September, Messi scored his first goal for the club, a strike from the edge of the 18-yard box after playing a one-two with Kylian Mbappé, in a 2–0 Champions League group stage win over Pep Guardiola's Manchester City. On 21 November, Messi scored his first Ligue 1 goal in a 3–1 home victory over Nantes. On 28 November, Messi provided a hat-trick of assists for the fifth time in his career as PSG beat Saint-Étienne 3–1 away from home. Having scored 40 goals at club and international level for the calendar year and helped Argentina win the 2021 Copa América, on 29 November Messi received a record seventh Ballon d'Or.
Title: Lionel Messi
Content:  raised in central Argentina, Messi relocated to Spain to join Barcelona at age 13, for whom he made his competitive debut aged 17 in October 2004. He established himself as an integral player for the club within the next three years, and in his first uninterrupted season in 2008–09 he helped Barcelona achieve the first treble in Spanish football; that year, aged 22, Messi won his first Ballon d'Or. Three successful seasons followed, with Messi winning four consecutive Ballons d'Or, making him the first player to win the award four times and in a row. During the 2011–12 season, he set the La 
Title: Lionel Messi
Content:  2004, which lasted until 2012 and contained an initial buyout clause of €30 million. A month later, on 6 March, he made his debut for Barcelona B in the Segunda División B, and his buyout clause automatically increased to €80 million. He played five games with the B team that season but did not score. Physically he was weaker than his opponents, who were often much older and taller, and in training he worked on increasing his muscle mass and overall strength in order to be able to shake off defenders. Towards the end of the season, he returned to both youth teams, helping the Juveniles B win the league. He finished the campaign having 
Title: Lionel Messi
Content:  senior squad, Barça's new star player, Ronaldinho, told his teammates that he believed the 16-year-old would become an even better player than himself. Ronaldinho soon befriended Messi, whom he called "little brother", which greatly eased his transition into the first team.  To gain further match experience, Messi joined Barcelona C in addition to the Juveniles A, playing his first game for the third team on 29 November. He helped save them from the relegation zone of the Tercera División, scoring five goals in ten games, including a hat-trick in eight minutes during a Copa del Rey match while man-marked by Sevilla's Sergio Ramos. His progress was reflected in his first professional contract, signed on 4 

Question: when did lionel messi play his first game for barcelona?
Answer: 2002.
2001.
October 2004.