text: Dizzy Nadal retires in Florida heat, Murray moves on | World News Online
  Dizzy Nadal retires in Florida heat, Murray moves on
  Spaniard Rafa Nadal retired from his second-round match at the Miami Open on Saturday due to a bout of dizziness, while Andy Murray advanced despite blowing hit top at an umpire after finding a women's ball among those he was using.
  Nadal trailed 94th-ranked Damir Dzumhur 2-6 6-4 3-0, with the Bosnian 30-15 up on serve, when he called it a day. It was the first time Nadal had quit during a match since a quarter-final against Murray at the 2010 Australian Open.
  "Everything was fine until the end of the first set," Nadal said. "Then I started to feel dizzy, not very good. It was getting worse and worse.
  Dzumhur was also affected by the heat early in the match and was the first to call a trainer, but he battled on and after a poor first set eventually gained control to post his first career victory against a world top-10 player.
  In the night session, Briton Murray had a heated exchange with the chair umpire en route to a 6-3 7-5 victory over Uzbek Denis Istomin.
  Murray faced break point at 2-2 in the second set when he noticed that a women's ball had somehow got into the mix. Women use different balls at the Miami Open, and they have a red stamping to differentiate them.
  The umpire said he was fully aware but could do nothing about what had transpired.
  Number four Stan Wawrinka was the highest seed to lose on Saturday after the Swiss was sent packing 6-4 6-3 by Russian Andrey Kuznetsov, who saved eight break points.