Arsenal will play Chelsea in English football's FA Cup semi finals, after the Gunners beat Hull City 2-1 in their quarter final replay.
Arsenal came back from a goal down but the winning goal was a disputed header by defender William Gallas, who appeared to be offside.
Hull have also accused injured Arsenal captain Cesc Fabregas of spitting at their assistant manager in the tunnel after the game.
The other semi final sees Manchester United play Everton.
