The Swiss star has won a major in each of the last three years with victory over Novak Djokovic at the US Open in September going with the French Open in 2015 and the Australian Open in 2014.
But he has dipped in form during the clay runner-up events and is without a title so far this year, but the 32-year-old is a dangerous animal when wounded.
He suffered surprise early round losses in Monte Carlo, Madrid and Rome, but is now looking towards the French Open.
Wawrinka also reached the quarter-finals in 2013 before losing out to Andy Murray in the last four last year. Yet the power he is able to generate with his groundstrokes and backhand can be formidable on the Parisian dirt.