Richard Mille and Spanish tennis ace Rafael Nadal have joined forces once again as the French Open kicks off today at Roland Garros. This year, they launched the RM 35-02, the first watch with an automatic movement in a collection they have developed together over the past six years. Richard Mille and Rafael Nadal have been partners since 2008 to explore contemporary fine watchmaking. Now, Nadal’s name graces a line of Richard Mille watches that are synonymous with innovation, lightness and shock resistance. Every model they co-engineered, starting with the RM 027 in 2010 with its carbon nanotube case, to the cable-suspended movement of the RM 27-01, or the latest…