Juan Mata says he is not worried about the competition for places at Chelsea and is focused on trying to improve. Willian has become the latest recruit to bolster Jose Mourinho's attacking midfield options following the summer signing of Andre Schurrle and the return of Kevin de Bruyne from a loan spell at Werder Bremen. Victor Moses has left for Liverpool on a season-long loan but Oscar and Eden Hazard remain key players at Stamford Bridge and Mata has not been a regular starter yet this season after his preparations were disrupted by injury. He is now fully fit and raring to go and maintains that having so many talented players can only benefit the Blues as they challenge for silverware on multiple fronts. The Spaniard told Sky Sports News: "I think it is very good for the club for the squad and for the manager. "I think they are really good - De Bruyne Schurrle Willian they are quality young players. Each one has his different position his different skills but I think all of them can give us a lot and I think it is better to have a more complete squad. "I wish we could play six together but it is not possible. But it is good for the club for all the competitions we have to face this season." Asked if he was optimistic of playing more regularly Mata replied: "I am very optimistic and positive. To be honest it has been a difficult position for me with an injury so I could train less than my team-mates but now I am feeling better and I am looking forward to playing.