Wawrinka tattooed this sentence on his left arm: "I have tried, I have failed, it doesn't matter, try again, fail again, and fail better." I have tried and failed, but it doesn't matter. Try again and fail again. Every failure is progress. ) "This famous saying comes from the prose collection of Nobel Prize in Literature winner samuel beckett, and it is also the inner monologue of Wawrinka's half-life career.