Novak Djokovic sets up red hot semi-final against Daniil Medvedev

Despite a dominant straight-set win setting up a semi-final against Daniil Medvedev at the Astana Open, Novak Djokovic feels there's room for improvement.

Djokovic beat Karen Khachanov 6-4 6-3 in 88 minutes to advance to his sixth semi-final of the season.

"I didn't play as well from the baseline as I did in the first two matches, but still it was enough," world number seven Djokovic told the ATP Tour's official website.

"I managed to produce some good tennis when it was the most needed in both sets. I always expect highs from myself. Hopefully I can elevate still the level of my game because it's going to be needed, obviously."

Number two seed Medvedev made light work of his quarter-final, beating Spain's Roberto Bautista Agut 6-1 6-1 in just 64 minutes.

"I am really happy to play against Novak," Medvedev said in his on-court interview.

"I thought about it before the match and we have only played one tournament together this year, which was Roland Garros."

The other semi-final will be between Andrey Rublev and Stefanos Tsitsipas.

Rublev eased past Adrian Mannarino 6-1 6-2, while Tsitsipas also won in straight sets with a 7-6 (8) 6-3 victory over Hubert Hurkacz.

At the Japan Open, Nick Kyrgios pulled out of his quarter-final with Taylor Fritz just minutes before the match was due to start because of a knee injury.

"It's heart-breaking," Kyrgios said in a press conference. "I've been playing amazing tennis all year and actually was dealing with a bit of a knee issue around the US Open time.

"I got back home and probably didn't take enough time off, to be honest. I went straight back into training."

Fritz will face Denis Shapovalov, a 6-4 6-3 winner against Borna Coric, in the last four.

Francis Tiafoe and Kwon Soonwoo will meeting in the other semi-final after respective straight set wins over Miomir Kecmanovic and Pedro Martinez.

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