KEY BISCAYNE, Fla. -- Hot but happy, Novak Djokovic had just begun celebrating his latest championship when he tossed his towel and sweatbands into the crowd. They were soggy souvenirs for sure.
Djokovic earned his fifth Key Biscayne title Sunday, beating Andy Murray for the seventh consecutive time by showing superior stamina in the subtropical heat to win the Miami Open final 7-6 (3), 4-6, 6-0.
Murray broke in the final game of the second set to even the match, but fatigue then became a factor on a sunny, humid, 80-degree afternoon. Djokovic was the fitter player down the stretch.
"It was brutal. It's very warm," Djokovic said. "I was prepared for a physical battle. But it's one thing to prepare and another thing to experience it on the court. I was expecting very long rallies and just managed to play the third set the way I was supposed to, and I'm thrilled with this win."
The top-ranked Djokovic became the first man to complete the Indian Wells-Key Biscayne spring sweep three times. He beat Murray in the Indian Wells semifinals and in the Australian Open final for his eighth Grand Slam title two months ago.
Murray fell to 8-18 against Djokovic.
"I'm not quite there with Novak yet, but I feel like I'm getting a little closer," Murray said with a chuckle. "I'm sorry I couldn't make more of a fight of it in the third set. I was trying. My legs were tired, and I couldn't quite finish hard enough."
Murray will climb from fourth to third in the new rankings, but he has lost 12 consecutive matches to his biggest rivals -- Djokovic, Rafael Nadal and Roger Federer -- since winning Wimbledon in 2013 by beating Djokovic in the final.
Djokovic was inconsistent early in the tournament and let his frustration show, receiving two code violations and a point penalty during one win. He drew another code violation in the final for swearing after he lost the second set, but he quickly regained his poise.
In the last set, Murray hit two weary backhands into the net to lose serve and fall behind 1-0. Two games later, he saved five break points before dumping another backhand into the net to go down 3-0, and Djokovic easily closed out the win.
Murray acknowledged his third-set shutout on Twitter.
Congrats to Novak on a great start to the year.. However this egg today wasn't appreciated on easter😂— Andy Murray (@andy_murray) April 5, 2015
Djokovic's fresher legs at the end of the 2-hour, 47-minute match were especially impressive because Murray lives in Miami and is more accustomed to the South Florida heat.
"I wasn't feeling great at all on the court," Djokovic said. "He was making me work. But he felt the same."
Murray conceded he wilted at the finish but said he trains as hard as he can.
"I don't think that I can do a whole lot more physically to get in much better shape," he said. "It's tough, because it was obviously pretty brutal conditions out there, and he was stronger than me at the end for sure."
The men's final matched two of the game's best retrievers, and they waged a succession of long, entertaining rallies in the early going. Djokovic's legs splayed as he skidded on the hardcourt digging out shots in the corners, and Murray hustled just as hard, closing one 35-stroke marathon with a backhand winner.
But the quality of play was patchy, and Djokovic converted only 5 of 18 break-point chances. Both players blew overheads and easy volleys, and the bright sun bothered them in the opening set, when they looked directly into the glare at the north end of the court.
The player with his back to the sun won the first 10 games, which included four service breaks. Djokovic ended the streak by holding into the sun for a 6-5 lead, and Murray matched the achievement.
In the tiebreaker, Djokovic took a 4-0 lead with his back to the sun and won the final two points on unforced errors by Murray.
As the angle of the sun changed, both players settled in on their serves and traded holds to 6-5 in the second set. Murray then came up with the shot of the match, blocking back a Djokovic overhead and landing it on the sideline for a winner.
Murray smacked a return winner on the next point to break at love and even the match, but that was his last hurrah.
His consolation: He's getting married Saturday in his hometown of Dunblane, Scotland. Djokovic won't be attending.
"Not invited," Djokovic said with a smile. "But I wish him all the best."