We take a look at some of the Premier League players who not only switched to other Premier League clubs but signed the dotted line for their sworn rivals.
Manchester United are different from when under former boss Alex Ferguson but they are anything but boring, West Ham United manager Slaven Bilic has said.
West Ham United manager says his players are "angry" after their loss to Tottenham Hotspur and will be looking to make amends against West Bromwich Albion.
London derbies and away matches have been the backbone of West Ham's success this season and the match at Spurs is the "perfect" game, says Mauro Zarate.
