Novak Djokovic has refused to elaborate on his injury struggles after crashing to one of the biggest upsets in tennis history at the Shanghai Masters.

World No.204 Valentin Vacherot became the lowest-ranked player to ever reach an ATP Masters 1000 final with a stunning 6-3 6-4 over Djokovic, who was clearly struggling.

The 24-time grand slam champion took multiple medical timeouts and at one point had his head in an ice bucket, but he was clearly outplayed by Vacherot, who earned his spot in the main draw through qualifying.

Djokovic showed his class at the net when he shook hands with his opponent, telling Vacherothe he deserved the win.

He continued that message in his post-match media conference as well.

“Going from qualifications, it’s an amazing story. I told him at the net th

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