A US Open third round match between Adrian Mannarino and fifth seed Alexander Zverev was inexplicably delayed at Flushing Meadows on Friday. The pair were supposed to take to Louis Armstrong Stadium around 2:30pm (1830 GMT) but close to two hours later and the match had still not started. Mannarino was one of several players put under enhanced safety protocols earlier this week after compatriot Benoit Paire was withdrawn from the tournament after testing positive for coronavirus. The United States Tennis Association did not immediately respond to requests for comment from AFP. pdh/rcw