HBA at fault in my opinion after having now watched motd.
Didn't track back for the first goal, got skinned for the 3rd after Debuchy had pressed his man and then Sissoko totally lost the goalscorer.
Give over. Hatem may not have helped with tracking back for the first goal but the least Debuchy should have done is maintain his position, not wander way into the centre where there is already cover leaving a huge gap where he is supposed to be.