Stan Wawrinka insists his recent knee pain is nothing to worry about

Stanislas Wawrinka, who retired with knee problems during his third-round match at Marseille, says he was experiencing a typical reaction and did not have a new injury.

The 32-year-old was playing his fourth event since coming back from double knee surgery in 2017.

"At 3-3, I hit a forehand volley and there was a slight contact with the knee," he told press in Marseille. "The previous two days of practice had been good... [but] matches are always different because of the tension, the nerves."

Though frustrated at having to retire, Wawrinka was happy with his improvement during this week and his previous two events at Sofia and Rotterdam.

Here are some highlights from his win over Viktor Troicki at Sofia:

"I'm told by my team, unfortunately and fortunately, these are normal pains," he said. "I have to take the positive I can find each day, in my tennis, physique, movement, and keep working."

The three-time Grand Slam champion was the tournament's second seed.

This Week on Tennis Channel Plus 2/19

ATP Rio (Feb. 19-22)

• Watch all of The Rio Open with extended coverage featuring three additional courts only available on Tennis Channel Plus

• The Rio Open begins on Tennis Channel Plus on February 19 at 2:30 p.m. ET with extended court coverage

ATP Marseille (Feb. 20-25)

-Don’t miss Stan Wawrinka, Davis Goffin and Jo-Wilfried Tsonga compete at The Open 13 live on Tennis Channel Plus beginning February 20 at 1 p.m. ET

SUBSCRIBE TO TENNIS CHANNEL PLUS at tennischannel.com/subscribe