Former world No. 1 Rafael Nadal hasn’t had an easy clay season so far but tennis analyst Paul Annacone underlined that beating Nadal at the French Open remains the most difficult thing in the game. Nadal, who sustained a rib stress fracture in Indian Wells, missed Monte Carlo and Barcelona before he returned to action in Madrid. Nadal recovered from a rib injury but he was hampered by his foot in Madrid (quarterfinal) and Rome (round-of-16). Nadal enters the French Open without a title won leading up to the event but he will sitll be among top favorites …