Stan Wawrinka may not be playing at the US Open but he is still in action when the tour restarts as he takes in his first ATP Challenger appearance in ten years at Prague.

World No.17 Wawrinka leads a stacked field including the likes of Jiri Vesely, Pierre-Hugues Herbert and Philipp Kohlschreiber and said he can't wait to get back in action.

"These were many difficult months for everybody," Wawrinka told Czech media. "I'm looking forward to be back playing some matches here. It's important to restart the season again with these two tournaments in Prague.

"I went to the park the see some of the city today. It was really nice and I love it here. It's going to be a great time. For me, it was nice to spend time at home with my daughter when we were in quarantine. That was the positive for me. But I'm happy to be playing again now."

Proshots