Claim: The Celtic F.C.'s league is the Scottish Premiership.
Evidence: The Celtic Football Club -LRB- -LSB- ˈsɛltɪk -RSB- -RRB- is a professional football club based in Glasgow , Scotland , which plays in the Scottish Premiership.
The Scottish Premiership , known for sponsorship reasons as the Ladbrokes Premiership , is the top division of the Scottish Professional Football League , the league competition for men 's professional football clubs in Scotland.