Juan Martin del Potro was frustrated by his four-set loss to Rafael Nadal in the US Open semi-finals. Adam Hunger / AP Photo
Juan Martin del Potro was frustrated by his four-set loss to Rafael Nadal in the US Open semi-finals. Adam Hunger / AP Photo
Juan Martin del Potro backs Rafael Nadal to go on to become US Open champion
The Argentine frustrated by his four-set loss to the world No 1 after winning the first set of semi-final clash in New York.
Agence France Presse
September 09, 2017
