His triumph this year came after the Olympic champion suffered a surprise early exit, although he had earlier ended Nadal's 33-match winning streak on clay in the Madrid Open final.
The 22-year-old Spaniard, who arrived in Paris having lost his 33-match winning streak on clay to Roger Federer in Madrid, did not appear to be moving as well as he usually does on the red dirt and he was given a thorough workout by Daniel.