He was having a really poor game - although the work-rate, intensity and effort were still there as ever - until Cavani came on and then he changed completely.
Having off-ball runs to pick out, runs that stretched the defence and created space for him to work in, raised his game massively...and he, along with Cavani, were absolutely key to the comeback. He played some lovely balls second-half, much better in possession and the usual clinical finish in front of goal.
I've said it before, but imagine how much better he would be than he is already if he always had forwards in front of him who actually moved and made runs.