Referee Martin Atkinson is surrounded by Chelsea and Manchester United players after a challenge on Chelsea's Ricardo Carvalho (lying injured) during the English Premier League footbal match between Chelsea and Manchester United at Stamford Bridge in London on November 8, 2009. AFP PHOTO / Adrian Dennis  FOR EDITORIAL USE ONLY Additional licence required for any commercial/promotional use or use on TV or internet (except identical online version of newspaper) of Premier League/Football League photos. Tel DataCo +44 207 2981656. Do not alter/modify photo. Getty Images logo Getty Images 1 week ago

Referee Martin Atkinson is surrounded by Chelsea and Manchester United players after a challenge on Chelsea's Ricardo Carvalho (lying injured) during the English Premier League footbal match between Chelsea and Manchester United at Stamford Bridge in London on November 8, 2009. AFP PHOTO / Adrian Dennis FOR EDITORIAL USE ONLY Additional licence required for any commercial/promotional use or use on TV or internet (except identical online version of newspaper) of Premier League/Football League photos. Tel DataCo +44 207 2981656. Do not alter/modify photo.