Rafael Nadal faded in the subtropical heat and retired after falling behind in the third set of his opening match at the Miami Open against Bosnia's Damir Dzumhur.
The No. 5-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.
Eight-time champion Serena Williams avoided the upset bug and seemed unfazed by the weather. The South Floridian earned her 20th...