The Australian Open third round match between Ana Ivanovic and Madison Keys was suspended on Saturday night after Andy Murray's father-in-law Nigel Sears collapsed in the stands.
Sears, who coaches Ivanovic, was rushed to hospital in an ambulance after receiving urgent medical attention at the Rod Laver Arena in Melbourne.
Serbian Ivanovic won the first set 6-4 and was 1-0 up in the second before the incident occurred.
After being carried out of the Arena on a stretcher, it was reported that Sears - father of Kim Murray - was conscious and speaking on his way to the hospital.
Ivanovic and Keys eventually returned to the court after around 45 minutes of play being suspended.
Meanwhile in the Margaret Court Arena, Murray took on Portuguese Joao Sousa unbeknownst to events elsewhere.
The Scot comfortably took the first set 6-2 but slipped in the second, losing 3-6.