Djokovic knocked out early in Cincinnati after struggling in sapping heat

Novak Djokovic suffered defeat and struggled physically in his first match since Wimbledon as he was upset by Thiago Agustin Tirante in a sapping three-set contest at the Cincinnati Open.

Djokovic, inactive on the ATP Tour since losing to Jannik Sinner at the grass-court Grand Slam on July 10, won the first set 6-2 but then lost the next two 6-4 as he battled the heat and humidity in Ohio, even appearing to vomit at one stage.