The 2009–10 Serie A (known as the Serie A TIM for sponsorship reasons) was the 108th season of top-tier Italian football, the 78th in a round-robin tournament. There were three promoted teams from the Serie B, replacing the three teams that were relegated following the 2008–09 season. Nike provided a new match ball – the T90 Ascente – for this season. Following the season, citing a larger television contract, the seventeen teams that survived the season and the three promoted sides formed a new league akin to England's Premier League. The title race was only settled on the last day of the season. The title was won by Internazionale, their fifth title in a row. Inter would go on to complete the first and only treble by an Italian team by winning the Coppa Italia and Champions League.

Teams

The following 20 teams participated in the 2009–10 season:

Personnel and sponsorship

Managerial changes

The list does not include Serse Cosmi's resignation from Livorno on 24 January 2010, as it was rejected by the club two days later following a meeting between Cosmi and club chairman Aldo Spinelli, with no competitive game scheduled in between the short vacancy period.

League table

Results

Top goalscorers