Celtic F.C. is a professional soccer team.
Association football , more commonly known as football or soccer , is a team sport played between two teams of eleven players with a spherical ball . Celtic F.C. . They played their first match in May 1888 , a friendly match against Rangers which Celtic won 5 -- 2 . Rangers Football Club are a football club in Glasgow , Scotland , which plays in the Scottish Premiership , the first tier of the Scottish Professional Football League . The Scottish League Cup , currently known as the Betfred Cup for sponsorship reasons , is a football competition open to all Scottish Professional Football League ( SPFL ) clubs .