Pat Bonner
BBC Scotland pundit

"Rangers did well for the first half-hour but their legs got tired quickly. You have to question putting up a midfield like that against Celtic. Joey Barton doesn't have the legs anymore and he is not at the level of Rangers players of the past. Niko Krankcar just can't run, and Josh Windass was the best of the three, but that was the area where the game was won."   

Tom English
BBC Sport Scotland at Celtic Park

"There's been way too much loose talk about whether Rangers can mount a title challenge to Celtic. That chat will end now. There is a huge gulf between these team and it was confirmed this afternoon. Celtic had too many guns and too much energy and ability. Rangers' problems were as we suspected they would be - nowhere near enough pace and power in midfield and all sorts of vulnerabilities in defence."

Tom English
BBC Sport Scotland at Celtic Park

"Celtic are finishing games so strongly and scoring a lot of goals late on, even without the help of a red card.  They have a new-found ruthlessness in front of goal under Brendan Rodgers.  They are certainly not flattered by 5-1.  It was a stroll. Rangers were on the back foot from the start and Celtic just routed them. There is just a great gulf between Celtic and Rangers." 

Now here's a thing - we think that every outfield Celtic player got a touch in Celtic's fifth goal, which was scored by Stuart Armstrong.

Celtic have now scored 15 goals in their first four Premiership matches. They lead Rangers in the table by four points and they have a game in hand over their dejected rivals.

Former Rangers and Scotland striker Steven Thompson on Radio Scotland: "It is no longer just a convincing performance from Celtic. It is an embarrassment for Rangers.  Questions are going to be asked."

Rangers goalie Martyn Waghorn almost lobs Dorus de Vries but the big Dutch keeper gets his finger tips to make the save.

While the headlines will be all about hat-trick star Moussa Dembele, let's not forget Celtic's other scorer, Scott Sinclair. And who provided the pass for his goal? Why, that would be Dembele.

Image source, SNS

Oh, by the way, Moussa Dembele was booked for celebrating his hat-trick. It's a strange form of entertainment, football.

Pat Bonner
BBC Scotland pundit

"We asked whether Dembele could lead the line and score the goals from open play. He has certainly shown today he can do that.  The confidence is going to be oozing out of his body after his hat-trick.  You don't get this story too often. He also laid on the fourth goal for Sinclair.  It is a brilliant day for the young man."