Chelsea striker Diego Costa is proving every bit as lethal as his La Liga form last season suggested, and is defying expectations of anybody who thought he would need to adjust to the Premier League.
The Spaniard has eight goals in six Premier League games this season, and not even Arsenal boss Arsene Wenger expected him to be this good.
Ahead of the two sides' meeting this Sunday, Wenger has praised his dangerous opponent.
He told Arsenal.com: “I’ve never seen a player adapt as quickly as he has.
"He has done fantastically well. He has all the aspects of a striker that you like. He’s focused, always determined, ready for a fight and I’m very impressed.
"The timing of his runs and his determination, his killing determination - you feel he’s a killer. He has that in him."
The 'need to adapt' has often been an excuse used over the years to defend foreign signings who have failed to hit the ground running.
Costa has proved that if you are good enough, it should not be an issue, especially for a striker whose main job is scoring goals.
The £32 million Chelsea paid for him appears a real bargain, and it's hard to wonder if Arsene Wenger is himself regretting not making a serious attempt to sign the former Atletico Madrid side.