World Cup final referee Howard Webb has the task of keeping control when Manchester United and Chelsea meet at Old Trafford on Sunday in a potential Premiership title decider. The Blues will jump above United on goal difference with just two games remaining should they win and Sir Alex Ferguson has already expressed his concern at the number of key decisions that have gone against his team in big matches this season.
However, Webb came down on United's side when he gave them a penalty against Liverpool in an FA Cup tie earlier this season.
