Kei was too erratic especially on the forehand, made too many mistakes there and wasn't very effective at opening the court, should have used his BH more. I don't see much for RG, intensity is still not like it was the same time last year. Del Potro hit some nice FHs and was solid enough. Good luck against Djokovic.
downside is Kei's ranking is plummeting hard. He has no cushion the way Murray and Djokovic have.