 Complete the following phrase:  Claiton started his professional football career at Bologna and played once in Serie A, on 17 June 2001. Bologna lost to Internazionale 12. In January 2002, he was signed by A.C. Milan and played for their Primavera team. On 18 December 2002, he made his debut for the club, coming in as a substitute for Alessandro Costacurta in the Coppa Italia 18 finals against Ancona. He was also featured as an unused bench for Milan in Serie A on 24 May 2003, the game right before the 