Founded in 1905, they were elected to play in The Football League as members of the Second Division.
[3] The club has remained in the top division of the English football league system since 1989.
[6] Since that game they have faced eighty different sides in league football with their most regular opponent having been Arsenal, whom they have played on 175 occasions since their first meeting on 9 November 1907.
[9][10] Chelsea have drawn more matches with Manchester United than with any other club, with 54.
[11] The side has lost more league games to Liverpool than to any other club, having been defeated by them 72 times in 163 encounters.