Claim: The Chelsea F.C. lost competitions between 1965 and 1971.
Evidence: 1954–55 Chelsea F.C. season
.
Chelsea Football Club -LRB- -LSB- ˈtʃɛlsiː -RSB- -RRB- is an English professional football club based in Fulham , London , that competes in the Premier League , of which they are reigning champions.