U.S. Open: Nadal remains unbeaten hardcourts in 2013.

Rafael Nadal on hardcourts, running his record to a perfect 16-0 in 2013 on Monday at the U.S. Open with straightforward victories against Ryan Harrison of the United States.

Nadal, the No. 2 seed and a favorite to win, according to many observers, visiting 6-4, 6-2, 6-2 victory.

Day 1: Venus Williams gets easy win.

"I played really well," Nadal said. "I just played really well, I think. I played in a very good ".

It was Nadal's first match at the U.S. Open when he lost in the final to Novak Djokovic in 2011, he missed the second half of last season and the first two months of this year with a left knee injury.

U.S. Open: Nadal remains unbeaten hardcourts in 2013.