It's fascinating to see how little effort Nadal puts in his shots these days. And he is the last player I thought I would accuse this of. It could be that he still hasn't gotten used to the the conditions in Miami and didn't want to make too many errors.
He needs to be way, way more aggressive, his game that he showed in Australia is clearly gone and he needs to recover it during the clay masters. I could barely watch his match against Sela. He did hit a few winners, but Sela himself was atrocious and hit a ton of high balls for Nadal to dispatch. He won't win the title playing like this, no way. Needs to find a new gear.
And regarding Dimitrov's match, it was so bad, watching the whole thing would have resulted in me ripping my hair out. Catastrophical. I hope he as well can find some form on clay this year.