MIAMI: Nick Kyrgios has advanced to the third round at the Miami Open on a day where multiple grand slam champions Stan Wawrinka and Rafael Nadal fell by the wayside.
Kyrgios made short work of Cypriot Marcos Baghdatis, defeating him 6-2 6-1 in just under an hour, the Aussie firing down 14 aces in the impressive victory.
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The win means Kyrgios could await a serving showdown with veteran American John Isner, who will play countryman Tim Smyczek later on Saturday.
While Kyrgios made it through there was no such luck for Australian journeyman John Millman.
Millman fell 7-5 6-4 in his second round match to Uruguayan 23rd seed Pablo Cuevas.
One break of serve in each set enough to send Millman, who couldn't force a break point on Cuevas' serve packing.
While it was a mixed day for the Aussies it was a shocker for two of tennis' biggest names, Wawrinka humbled and Nadal unwell in the Florida heat.
Nadal faded in the subtropical heat and retired after falling behind in the third set of his opening match Saturday at the Miami Open against Damir Dzumhur.
The fifth-seeded Nadal trailed 2-6 6-4 3-0 when he called it quits after losing a point to fall behind 30-15. He had earlier consulted with a trainer at his chair between games three times, and had his blood pressure checked.
The match lasted less than two hours, but the weather was sunny and humid, with a temperature approaching 90 degrees and even higher on the stadium hardcourt.
Nadal, a 14-time Grand Slam champion, hasn't won a tournament since August. But it had been 443 matches since he retired - in the 2010 Australian Open quarterfinals against Andy Murray.
Key Biscayne remains one of the biggest tournaments Nadal has never won. He's 0-4 in finals.
Dzumhur, a 23-year-old Bosnian ranked 94th, rallied with a variety of tactics, including half a dozen drop shots for winners and an occasional serve and volley.
Nadal had to work hard from the start, failing to convert nine break-point chances during a marathon second game before Dzumhur double-faulted to lose serve.
The heat also appeared to bother Dzumhur, who consulted with a trainer following the first set.
Nadal's departure left the draw without three of the five highest-seeded men.
Wawrinka earlier suffered a shock 6-4 6-3 loss to world No.51 Russian Andrey Kuznetsov and No. 3 Roger Federer withdrew Friday because of a stomach virus.
Kei Nishikori defeated qualifier Pierre-Hughes Herbert 6-2 7-6 (7-4) while Milos Raonic, the runner-up at Indian Wells this month, beat Denis Kudla 7-6 (7-4) 6-4 to also advance and he will play Jack Sock in the third round.
In-form Frenchman Gael Monfils is also through to the third round with a comfortable 6-3 6-2 win over Japanese qualifier Tatsuma Ito.