West Ham have strong rivalries with several other clubs. Most of these are with other London clubs, especially with Tottenham Hotspur in an East versus North London derby and with Chelsea in an East versus West London rivalry. The rivalry between West Ham and Tottenham has been fuelled by players such as Michael Carrick, Martin Peters, Paul Allen, Jermain Defoe and Scott Parker leaving the Hammers to join Tottenham. The rivalry deepened with the appointment of former Hammers manager Harry Redknapp as Tottenham's manager. Since the 2006–07 Premier League season, West Ham have developed a strong rivalry with Yorkshire club Sheffield United due to the dubious circumstances surrounding the transfer of Carlos Tevez, who helped West Ham avoid relegation at Sheffield United's expense.
West Ham have strong rivalries with several other clubs Most of these are with other London clubs especially with Tottenham Hotspur in an East versus North London derby and with Chelsea in an East versus West London rivalry The rivalry between West Ham and Tottenham has been fuelled by players such as Michael Carrick Martin Peters Paul Allen Jermain Defoe and Scott Parker leaving the Hammers to join Tottenham The rivalry deepened with the appointment of former Hammers manager Harry Redknapp as Tottenham's manager Since the 2006–07 Premier League season West Ham have developed a strong rivalry with Yorkshire club Sheffield United due to the dubious circumstances surrounding the transfer of Carlos Tevez who helped West Ham avoid relegation at Sheffield United's expense