Filipe Luis has no doubts Diego Costa will become a fans’ favourite at Chelsea.

Both players joined Chelsea this summer from Atletico Madrid.

“Diego is an unbelievable player – you are going to love him, because he gives everything for the shirt,” Luis told the official Chelsea magazine. “If he isn’t already the best No 9 in the world, he will be very soon.

“He’s a brilliant player with a big heart and I’m very happy he’s here with me because he’ll help me grow as a Chelsea player.

“I know him very well and I know he fights for every ball. If I have won the ball in a forward area of the pitch, I know I have to look to give it to him because he is better than me in front of goal.

“So, I always try to find him, look where he is and get the ball to him, because I know he is going to score.”

Cesc Fabregas is also expecting big things from Diego Costa at Chelsea this season.

The former Atletico Madrid striker struck twice in victory over friendly opponents Real Sociedad last night.

Cesc told Chelsea magazine: “Diego has been progressing a lot in the last two years, especially the last year. He was immense, a real threat in every game.

“He was playing every three days but he was consistently really strong. He goes behind the defence, making the kind of run players like me are really happy with because it gives you an option to play the killer ball. He will do superbly here.”