Novak Djokovic refuses to answer questions after surprise defeat to world No.204

Novak Djokovic refused to answer questions about his injury and upcoming schedule after suffering a shock defeat to Valentin Vacherot at the Shanghai Masters. The 38-year-old was clearly physically hampered and called the physio to the court multiple times for what appeared to be a hip injury.

But he played on, and world No. 204 Vacherot - who came through qualifying to reach the main draw in Shanghai - caused the biggest upset of the tournament as he beat the four-time former champion 6-3 6-4.

Djokovic is now scheduled to compete in the upcoming Six Kings Slam, an exhibition event in Saudi Arabia taking place on September 15, 16, and 18. As the man with the most Grand Slam titles, he will receive a bye directly into the semi-finals.

But it's not known whether the Serbian superstar will still head to Riyadh after suffering a fresh setback against Vacherot on Saturday. When asked about his plans to play the Six Kings Slam, Djokovic simply gave credit to his opponent.

"I want to congratulate Valentin for reaching his first Masters final. Going from qualifications, it's an amazing story," the No. 4 seed in Shanghai said.

"I told him at the net that he's had an amazing tournament, but more so his attitude is very good, and his game was amazing as well.

"So it's all about him. I wish him all the best in the finals, and the better player won today."

The 38-year-old also refused to discuss his physical condition. When probed, he simply replied: "No. Next question, please."

Djokovic enjoyed a warm embrace with Vacherot after the Monegasque qualifier became the third-ranked player in history to defeat the 24-time Major winner.

Although Vacherot has very little experience at the top level of tennis, Djokovic was aware of the world No. 204 and his talent, having seen Vacherot and his half-brother and coach, Benjamin Balleret, at the Monte-Carlo Country Club.

Before facing Vacherot on Saturday, Djokovic explained: "I've known him for last couple of years. Obviously he's ranked before this tournament 200-plus. He's been around.

"He's playing for Monaco, which is a really great success, the biggest historical success for Monaco. It's amazing. So everyone is excited there. We know we have one of the nicest and biggest tournaments in our sport there in Monaco.

"So I'm glad for him, for his team. Benjamin Balleret is someone I've known for many years from Monaco, because being based there for 15 years, training at the Monte-Carlo Country Club.

"He's been improving a lot. We always knew that he's got a great potential, with a big serve, a big game, he's a big guy."