Jürgen Klopp, his delighted manager, described it as a "genius moment" but just what was going through the head of Liverpool's Philippe Coutinho as he bore down on David de Gea's goal last night?The Brazilian's brilliant goal shifted the balance of an exciting round of 16 second-leg tie irrevocably away from Manchester United. It also stunned into silence a hitherto raucous Old Trafford.And it was the moment that De Gea, who made four terrific saves to foil Liverpool's No10 over these two legs, was finally left with no answer as Coutinho, approaching from the left, dinked the ball cheekily between the United keeper and his near post."I had the chance to be face to fa...