Anyways, kinda entertaining match. Wawrinka should've ended this match a lot earlier but decided to be a giver by spraying errors all over the place.
As for Nadal, it was nice that he fighting hard until the end. Also, his forehand and footwork is getting better each day which shows his confidence is increasing match by match.
In my opinion, the KEY for Nadal in 2016 is how well can he handle the crucial points towards the latter stages of each set. This match showed you that he gets tight and miss easy routine shots when he is leading or about to take the set.
He was serving for the 1st set but got broken. Then in the 2nd set tiebreaker, he had a two break lead but lost the lead. Finally, on set point, on his serve, he failed to capitalize the set.
These are the type of moments that Nadal needs to conquer in order to have an amazing 2016. I know he is 29 years old and it won't be easy, but he is talented enough to overcome these types of mental lapses on crucial points.