Alexandre Pato started his youth career in his homeland as he signed for Brazilian club Internacional in 2000 at the age of eleven. The youngster's first team debut for Internacional arrived in 2006 as they beat Palmeiras 4-1 with Pato scoring once and claiming three assists. This stunning debut saw Pato included in the Internacional squad for the 2006 FIFA World Club Championships in Japan. The striker made an instant impact in the semi finals against Al-Ahly with the first goal in the team's 2-1 victory. Pato started the final against Barcelona but was substituted in the 61st minute. However, Internacional shocked the European giants with a 1-0 victory giving Pato his first taste of success in his first professional season. Alexandre Pato returned to Brazil in 2012 with Corinthians.
AC Milan moved quickly to sign the player in August 2007 although he was unable to play until January 2008 due to the Italian transfer window. Pato scored his first competitive Milan goal in Serie A on his debut against Napoli in a 5-2 victory before managing his first two goal haul for the club a few weeks later as Milan beat Genoa 2-0. He managed to finish the 07/08 season with 9 goals in 20 appearances for the club.
Pato continued to perform well throughout the 08/09 campaign with goals being scored consistently throughout the season in Serie A and the UEFA Cup. He ended the season with 18 goals meaning he was AC Milan's top goalscorer for the season at the age of just 19. The young forward has continued to progress and he scored two goals recently in Milan's 2-1 opening day win against Siena in Serie A.
Pato's international career has yet to take off in the same manner as his club career. Brazil have high hopes that Pato will be their leading striker for many years ahead. The Brazilian forward moved back to Brazil in 2014 signing for Corinthians. This was followed by a loan move to Sao Paulo in 2014.