Novak Djokovic moved into the third round of the US Open after fellow Serb Laslo Djere retired injured while trailing 6-4, 6-4, 2-0. Djere, who had previously given Djokovic a tough five-set battle in the third round last year, appeared to suffer an injury during the second set and was unable to continue. Djokovic, despite appearing rusty in the opening round, secured the victory and will now face Australian Alexei Popyrin in the next stage.