Rafael Nadal: 'I had to fight against Diego Schwartzman'

Rafael Nadal has revealed that his US Open clash with Diego Schwartzman was tougher than the result suggests.

The world number eight progressed to the third round with a win in straight sets, but Nadal was broken twice by his opponent in the first set, before eventually taking the tie-break.

Speaking to ESPN after the match, Nadal said: "That first set was very important, with these humid conditions I think that I was playing very aggressive, playing at a very high level so that first set was very important for me.

"I felt a little bit more comfortable [in the second set], I think I started the match playing well with good feelings.

"Then you have to fight - the second set had been tough but I was able to break back quick and then have two breaks."

Nadal will take on Fabio Fognini in the third round on Friday.