I thought he tried hard last night, once he gave it away a few times his head kind of dropped for a bit but then he was chasing players, getting back, trying to do the dirty side of the game... only thing is that he is at absolute rock bottom with his confidence and Koeman doesn't seem like the kind of manager who helps players out of a slump, he just doesn't have the man management skills... case in point being hauling Klaassen off at half time which will just cripple his confidence further.
While he was trying hard to get back in the game, I can't remember who is was but we had the ball on the right side of the box (just inside it)... probably Vlasic but might have been Holgate... anyway on the replay you see Klaassen take up an unmarked position 18 yards out, centre of the goal, hands outstretched screaming for it... Vlasic or Holgate completely unaware of him and has a shot that's blocked by the defender and goes out for a corner (pretty sure it was Holgate). So even when he gets in a 'Klaassen' position the other players don't see him. Holgate pulling it back there and him smashing it in could completely change his confidence levels.
I feel for him, I really do... All my dutch Ajax supporting relatives said he wasn't ready for the PL when we signed him but I really think the manager and our players aren't doing him any favours what so ever.