Manchester United boss Ole Gunnar Solskjaer reportedly ordered his players to "keep their feet on the ground" after beating Manchester City 2-0 on Sunday.
The Red Devils downed the reigning Premier League champions to do the double over their local rivals thanks to goals from Anthony Martial and Scott McTominay.
The result extended United's unbeaten run in all competitions to 10 games - their best run since Solskjaer was given the job on a permanent basis having impressed as interim boss.
But Metro claim Solskjaer is wary of his side repeating their past mistakes as he quickly put the brakes on their celebrations and challenged them to hit that level more consistently.
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