Stan Wawrinka took some time from his busy schedule to hit with a couple of talented Special Olympics tennis players.

"I think they're quite happy today after our little practice," Wawrinka said. "We had fun on the court... They're playing really well."

Hitting in Monaco—where Wawrinka resides—the two players proved to be more than capable of keeping up with the three-time Grand Slam champion.

"After Switzerland, Monaco is the best-ranked country in the Special Olympics," Marc Muratori said. "So we're very proud of this and working hard to become No. 1"