The Brazilian joined the west London club on a temporary deal until the end of the season on Friday as Guus Hiddink moved to bolster his attacking options at Stamford Bridge.
Pato has been training with his Chelsea team-mates at Cobham in recent days and Hiddink said on Tuesday that he would make a late call about whether to include him in the squad for Wednesday’s Premier League trip to Watford.
The striker looked happy to be at the Premier League outfit, however, if the photo above posted on Chelsea’s official Instagram account is anything to go by.
Pato has been handed the number 11 shirt by the Blues following his arrival at the club last week.
Chelsea’s next Premier League game after their clash at Vicarage Road is their home showdown with Manchester United on Sunday.
MORE: Latest Man Utd news
MORE: Latest Arsenal news
MORE: The latest football news