Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua
Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua

Novak Djokovic: 'I'm playing my best tennis of the year'

No fatigue for Serb as he makes it 19 wins in a row against Juan Martin del Potro

Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua
Novak Djokovic hits a return against Juan Martin del Potro. Photo: Xinhua
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