The coach raged at the way his side let in the winning goal and believed Morgan Schneiderlin should have been sent off late in the game.
Dieter Hecking feels Chris Smalling's winner for Manchester United in Wolfsburg's 2-1 loss on Wednesday was a "s*** goal" for his side to concede.
The coach was left fuming at the final result after watching his men get off to the dream start at Old Trafford through Daniel Caligiuri's fourth minute opener in the Champions League Group B clash.
Yet United came roaring back and equalized through Juan Mata's penalty after Caligiuri was penalized for handball before the Spaniard's clever flick set Smalling up to slide in a second goal.