Derby County 3 Middlesbrough 1: Strachan facing music after loss
Boro took the lead when Kris Boyd, restored to the starting line-up, glanced in his second goal for the club.
But Derby responded and after Commons had a penalty saved by Jason Steele, they equalised just before half-time when Commons' corner was headed home by Shaun Barker.
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Hide AdCommons was the star of the show in the second half as he produced two classy finishes to give the Rams a second consecutive home victory which prompted County fans to taunt Strachan with chants of 'you're getting sacked in the morning'.