Andy Murray is set to start his grass season at the Surbiton Trophy, where he will be defending champion.
The former world No. 1 has entered the ATP Challenger event ahead of playing Stuttgart, Queen’s and Wimbledon.
The Surbiton Trophy starts on June 3, which coincides with the second week of the French Open.
The three-time Grand Slam champion has been out of action since late March with an ankle injury but will make his comeback at an ATP Challenger event in Bordeaux this week.
Wawrinka and Murray have both won three Grand Slam titles and at their best were two of the biggest threats to the ‘Big Three’ of Novak Djokovic, Rafael Nadal and Roger Federer.
But Murray has also spent time as world No. 1 and won 41 career titles, while Wawrinka has a career-high ranking of No. 3 and has 16 titles.
“From 18 years old until 30 he was always fighting with the Big Three, he was always there.
“Let’s put it that way, he won ‘only’ three because all the other [players] were taking but he was always in the final, he was always winning a lot. For me, his career is nothing compared to mine. He’s way ahead, he won many more titles, things than me, and his level was close to the Big Three for 10 years.”