 Complete the following phrase:  Chelsea are, to date, the only London club to win the UEFA Champions League, which theyve won twice in 2012 and 2021. On 15 May 2013, Chelsea won the UEFA Europa League to become the fourth club and the first British side to win all three main UEFA club competitions. Chelsea are also the only London club to have participated in the FIFA Club World Cup. They were runners-up in 2012, losing to Corinthians of Brazil in the 