I said in my
Judging from the highlights and the match stats Djokovic's returns and backhand is still in good shape while he made 72% of his first serves. Another thing that occured to me this week was his net game and he was 9/12 at the net vs Monfils.
Like Djokovic's game in general, his volleys are underrated. His backhand, movement, and returns are not underrated. Everyone knows those are world class. But I think his net game, serve, forehand, and touch is underrated.
You are not going to be an all-time great on grass like Djokovic without having some net skills. He has many strengths but his volleys are an important part of his game on grass especially. He has some pretty average overheads and he can look stupid at the net but when he plays well he can also play surprisingly well at the net.