Former Chelsea striker Andriy Shevchenko says Diego Costa must start scoring immediately to avoid being branded a flop.Chelsea have struck an agreement to sign the Atletico Madrid hitman, 25, for £32million.

AC Milan and Ukraine legend Sheva said: "The best thing for Costa is to score and score early.

"That will be important to him. The expectations from the fans and the club are very big so he needs to score and get going."

Costa netted 36 goals last season but he failed to live up to his billing during a miserable World Cup.

And Shevchenko said: "I'm sure he will do well. I think he is a good striker and I like him."

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