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Celtic fans have taken to Twitter to heap praise on Kristoffer Ajer, after the centre-back put in a match-winning display in the 2-1 win over Rangers in the Old Firm Derby.

The young Norwegian international was making his 16th league start of the season, and handled the heated occasion admirably amidst a scuffle between Scott Brown and Alfredo Morelos and a brawl following the final whistle.

Check out Keith from C'mon the Hoops' fascinating video on the origins of the Old Firm derby below...

For a player just 20 years of age to compose himself and focus in arguably one of the biggest games on the calendar for Celtic fans takes some doing.

Ajer didn't have to deal with the threat of Morelos after the striker's 31st-minute red card, although he still adequately handed anything that came his way with ease to draw praise from a lot of Hoops supporters.

He also made a huge last-ditch block just one yard from his own goal line with minutes remaining to maintain the lead - a truly heroic effort that essentially sealed the result in Celtic's favour.

Let's see what the Celtic fans on Twitter have been saying about the youngster's performance...