Patrick McEnroe has said he would never rule Rafael Nadal out of contention for the French Open title, but added that he gives Novak Djokovic a slight edge at this year’s Roland Garros. Nadal was forced to skip the start of the clay court season as a rib injury prevented him from participating in Monte Carlo and Barcelona.Nadal kicked off his clay court season in Madrid, where he was defeated in the quarterfinals. In Rome, Nadal suffered from pain due to persistent foot problems and ended up suffering a shock loss to Denis Shapovalov in the round of 16.On the other hand, Djoko …