Rafael Nadal on Wimbledon: It looks difficult

The 37-year-old Spaniard bid an emotional au revoir to the French Open on Monday after losing in the first round to Alexander Zverev.Nadal, a 14-time winner at Roland Garros, plans to be back in Paris for this summer’s Olympic Games and has not entirely ruled out a return next year.But he believes the quick turnaround from clay to grass and back again means he is almost certain not to return to the scene of his 2008 and 2010 Wimbledon triumphs.”It looks difficult, honestly,” he said. “For me now I can’t confirm what’s going on, but it looks difficult to make a transition to grass, having…