Jamie Murray collapsed with heat-stroke but battled his way into the second round of the men's doubles at the Australian Open alongside Australian partner John Peers.
Great Britain Davis Cup captain Leon Smith revealed Murray needed extensive treatment after suffering from the effects of the heat in the pair's 7-6 (7/4) 7-6 (8/6) victory over Matt Reid and Luke Saville.
The Scot, also the Lawn Tennis Association's head of men's tennis, told BBC Radio 5 Live: "About 15-20 minutes after the match finished he started to feel unwell and a bit of cramp and that is what the heat has done for him.
"But there is a great team in the locker room and they have kept him moving around for a couple of hours and getting the salts back in his body.
"He will be okay but he's got to work hard for the next couple of hours. He'll feel like sitting down but he needs to keep active and getting the right things in his body."
Murray and Peers will will play the Scot's former partner, American Eric Butorac, and South African Raven Kaasen in the second round.