"If the referee sees it properly, it's a red card. [Ballack] elbowed him, clearly. He's lucky. The referee was in line and should have seen it.
"When it came to their second goal, the referee made a rod for his own back. He'd stopped the game twice already, when Nani was down and a second occasion when Ballack was down. I spoke to the referee and he said it was a serious incident and [Ballack] needed treatment, though he was up straight away. When he did that, I didn't see why he didn't stop the game. The least he should have done was stop the game. That incident cost us the game. There's no question it's a grey area.
"We've seen that before with him. It's hard to blame the Chelsea players for that. It's a professional game. When players are acting to get the game stopped when they don't have possession, in terms of lying down — it's an area I'm concerned about. We've got to find a solution to that. You see it when a team has attacked and the others have a counter-attack, then a player from the first team lies down in the penalty box to try and get the game stopped. It's not right. Something has to be done about it.
"If the referees put more onus on the players again to stop the game, then fine. But he didn't get it right today. You have to be consistent and he did it twice, but not a third time."