Chelsea midfielder Nemanja Matic is confident Diego Costa will score plenty more goals this season after his Boxing Day double.
Costa has failed to hit the heights of 2014-15 so far this campaign, but bagged a brace in the struggling Premier League champions' 2-2 draw with Watford on Saturday.
The Spain striker, who is suspended for Monday's trip to Manchester United, has now scored five goals in 15 top-flight appearances this season and Matic feels he remains a key figure for Chelsea.
"Diego is a very important player for us," Matic told the official Chelsea website.
"He needed the two goals for his confidence in the future and I hope he will continue to score goals.
"I am sure he will do just that from now until the end of the season."
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