Costa struck a hat-trick - taking his tally to seven goals from four Premier League games - as Chelsea beat Swansea 4-2 on Saturday to extend their 100 per cent winning start to the season.Midfielder Fabregas, the former Arsenal captain signed from Barcelona, laid on two assists for Costa, who joined in a £32million deal from Atletico Madrid after long being coveted by Mourinho."To play with Fabregas is the dream of every striker," Mourinho told Chelsea TV."The guy sees the movement, sees the pass, is not selfish, makes always the right choice."Fabregas added on Chelsea TV: "Just trying to do my job. That's it."We have a good team, strong, young, with a lot of courage. We showed it again."Chelsea will have to show more in Wednesday's Champions League Group G opener with Schalke, a match which comes ahead of a trip to Premier League holders Manchester City.The Blues have scored 15 goals in four Premier League games but, unusually for a Mourinho team, they have conceded five times in the last two games following the 6-3 win at Everton."I don't like (conceding), but we were analysing the goals against Everton and trying to identify the mistakes and we'll do the same thing with these two goals (against Swansea)," Mourinho added."If you score more goals than the opponent you win, but you want to be more consistent behind because it's not possible to always score four, five, six or three."There will come a time when we need a point and a 0-0 is a point or we need a victory and 1-0 is also a victory."Mourinho will demands his defence improve, but in Costa it seems Chelsea have an added cutting edge this season.(uk.eurosport.yahoo.com)Bakudaily.Az