By Alex Stevens

Patrick Roberts has taken to Twitter to hail Moussa Dembele’s stunning hat-trick in Celtic’s demolition of Rangers on Saturday afternoon.

Brendan Rodgers’ team hammered Rangers 5-1 at Celtic Park in the first Old Firm league derby for four years.

The star of the show was Dembele, who scored the first hat-trick by a Celtic player in an Old Firm league match since Stevie Chalmers half a century ago.

Roberts, who was a second-half substitute, revealed he was “absolutely buzzing” for team-mate and fellow Fulham academy graduate Dembele.

Dembele, who spearheaded the attack in the absence of the injured Leigh Griffiths, has scored seven goals in 11 matches for Celtic since his transfer from Fulham during the summer.

Victory lifts Brendan Rodgers’ Scottish Premiership leaders – and reigning champions – four points clear of their city rivals, who started the day in second place, with a game in hand.

Celtic are now unbeaten in 17 games in all competitions and their dominant performance sets them up for Tuesday’s opening Champions League group game against Barcelona.

In other Celtic news, John Hartson has used two words to describe Rangers’ display against Rodgers’ side.