• Rafael Nadal

Rafael Nadal (Photo : NurPhoto via Getty Images)

Carlos Moya believes people have yet to witness Rafael Nadal's end, insisting that the King of Clay will comeback from a left wrist injury in best tennis form.

Moya, a former world No. 1 and coach to Canada's Milos Raonic, backs his compatriot Nadal over criticisms about the Mallorcan's ability to continue playing tennis at a high level. Moya is confident Nadal would return in his best form and continue where he left off before a left wrist injury kept him from competing at Roland Garros and Wimbledon.

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"Rafa Nadal will recover from this injury and his end is much later than many people assume," Moya said, reports Tennis World USA.

"I am tired when some questions are asked about whether Rafa will return to his best or not. For ten years they have always been talking about the same and at the end we all know what has happened."

It is unknown how long Nadal plans to continue playing tennis, but there is no doubt he still has plenty left in his tank. Nadal almost transformed himself back into "vintage Rafa," winning back-to-back titles in Monte Carlo and Barcelona during the European clay-court circuit. He was primed to reach the final round of the French Open before his latest setback forced him to retire hurt mid-event.

Manolo Santana, another Spanish tennis great, is also convinced Nadal won't be walking away from the tennis scene any time soon. However, the 78-year-old admitted it would be hard for Nadal to win tournaments as time is already ticking for the world No. 4.

"Unfortunately Rafa turned 30, I think he can win again but it will be even more difficult for him. He's willing to win and I think we are going to see him for another four years," Santana told Spanish media outlet AS.

Nadal will have a chance to test his left wrist at the Rogers Cup in Toronto, where he could play against the likes of Andy Murray, Novak Djokovic and Roger Federer. However, there is also a possibility of Nadal skipping the Rogers Cup as he focus on preparing for the 2016 Rio Olympics, which kicks off next month.