The Cameroon international scored the opener as the Blues thrashed London rivals Arsenal 6-0 at Stamford Bridge yesterday; however he was substituted with an injury in the first half.
Eto’o is now seemingly first choice under Mourinho, but the Blues boss has made claims over his age and fitness on numerous occasions this season.
Mourinho joked that the striker was 35, despite him turning 33 this month, and so Eto’o is kicking up a fuss over the jibes from his boss who also managed him at Inter Milan.
Chelsea are clear at the top of the league, but Manchester City have games in hand on them and can take over at the summit should they get the relevant results.
Eto’o can leave on a free this summer if he refuses to sign a new deal but success in the Champions League and Premier League could alter his current mind set.