We can see that Thiem is going to be a great player in the near future and start to see him winning Grand Slam tournaments. Credit goes to Nadal fighting back from 0-6 in the 1st set to come out as the winner. Nadal is mentally tough which is why he is so hard to beat, the only guy that can match it with Nadal in this is Djokovic. I was close to a nice payday with Thiem but its all good as he did try his hardest last night.
Nishikori is through to the semi-finals after beating Cilic in 5 sets, Nishikori could be the dark horse as we know he does play well at the Us Open.
And down goes my dark horse which is Cilic. Anyways Nishikori is no push over as well, its just that he also endured some injuries this year that's why his name is not in the contention. But winning a Cilic will be a big motivation and could be the dark horse to pull some upsets leading to the finals.