World Cup final referee Howard Webb will take charge of the crucial Premier League title showdown between Manchester United and Chelsea at Old Trafford on Sunday.
Chelsea 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.
The United boss was hit with a five-game touchline ban after criticising Martin Atkinson following his performance during the first meeting between the two sides at Stamford Bridge in March.
However, Webb came down on United's side when he gave them a penalty against Liverpool in an FA Cup tie earlier this season which led to Ryan Babel posting a mocked-up picture of the Yorkshireman wearing a United shirt on Twitter, earning the Dutchman a £10,000 fine.
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