SHANGHAI (AP) — Novak Djokovic had a relatively straightforward victory at the Shanghai Masters for a change as he beat unseeded Zizou Bergs 6-3, 7-5 Thursday to reach the semifinals, where he will face No. 204-ranked qualifier Valentin Vacherot from Monaco.

The 38-year-old Djokovic has struggled in the hot and humid conditions in Shanghai, vomiting during previous matches and needing medical attention when he slumped to the ground in exhaustion after being taken to a third set by Jaume Munar in the previous round.

The only major blip against Bergs was being broken when he led 5-4 in the second set, before finally converting his third match point.

“I should have closed out the match at 5-4,” Djokovic said. “Very challenging conditions these days for all the players, and I was just tryin

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