Spanish star Rafael Nadal has cruised through the first round of the 2016 U.S. Open Tennis Championships. He has overcome a wrist injury that has been bothering him since the French Open in June.

Rafael Nadal defeated Denis Istomin of Uzbekistan in straight sets on Monday 6-1, 6-4, 6-2. Despite what appeared to be an easy victory, the former world number one admits that he still felt nervous.

“If you don’t feel that then it’s because you really don’t want to win as much as you need or you are not afraid about the loss. When you don’t have those feelings it’s because you don’t have enough motivation for what you are doing,” he said.

In an interview with the ATP World Tour, he shared that the moment one stops feeling nervous, is the moment that indicates that it is time to retire. Nadal is now on a quest to win a third U.S. Open title. He previously won the event back in 2010 and 2013.

The man standing in his path in the second round is Andreas Seppi from Italy. For a player with Nadal’s caliber, the first few rounds should not pose a problem. However, after his injury sidelined him, every win became a major achievement.

Nadal took two months off after the French Open, and decided to return to competition at the 2016 Rio Olympics. Unfortunately, he only managed to reach the semi-finals. After the Olympics, he immediately joined the Cincinnati Open, despite admitting that his wrist still bothered him. He explained that resting is not going to help him, and his wrist needs to get back into competitive play, if he wanted to get back in shape.

World number one Novak Djokovic pushed to four sets in the first round. He eventually emerged victorious against Jerzy Janowicz of Poland 6-3,5-7,6-2,6-1.