Rafael Nadal comes to Roland Garros with many doubts. The Spanish phenomenon has had to deal with more than one setback in recent months and he hasn’t been able to play as much as he would have liked. After a fabulous start to the season, enhanced by his triumph at the Australian Open, the former world number 1 sustained a stress fracture in his rib during the Indian Wells Masters 1000.The 35-year-old from Manacor was forced to miss the first rounds on red (Monte Carlo and Barcelona) and did not shine in either Madrid or Rome. During the match against Denis Shap …