Grand Slam champion returns to US after US government relaxes rules for unvaccinated foreign travelers.
Serbian wins first-set 6-4 in Cincinnati singles against Fokina, retiring due to back issue.
Serbian defeats Fokina in Cincinnati singles, winning the opening set 6-4 before quitting with a back problem.
Ons Jabeur defeats Anhelina Kalinina to win her maiden Wimbledon match after losing the championship match.
In his first American singles match since 2021, Novak Djokovic defeated Alejandro Davidovich Fokina before retiring owing to injury.
Alejandro and Djokovic both expressed mixed feelings, as both men acknowledged their positive off-court friendship and Alejandro's recent lower back problem.
In his first singles encounter since the Wimbledon championship, Djokovic takes on 0-18 opponent Gael Monfils.
Danielle Collins, an American qualifier, is defeated by Iga Swiatek in the Cincinnati tournament quarterfinals.