Per Mertesacker has revealed how Arsenal needled Diego Costa and beat him at his own game.
Chelsea striker Costa is a notorious wind-up merchant on the pitch and has got opponents into trouble in the past with his expertise in the dark arts.
But it was Arsenal who had the last laugh in the FA Cup final at Wembley on Saturday, as Mertesacker admitted he and Rob Holding formed a “double act” to put the Spain international off his game.
Defender Mertesacker said: “We went to work on Diego Costa.
