KEY BISCAYNE, Florida (AP) ― Two boys stood on the top row of the stadium, beautiful Biscayne Bay at their back and the world’s best tennis player down below, as they waved a sign in his support.

“Djokovic in the house,” it read.

From the youngsters’ remote perch, Novak Djokovic looked like a tiny figure, yet he still loomed large. The top-ranked Djokovic won his third Sony Ericsson Open title Sunday, holding every service game to beat Andy Murray 6-1, 7-6 (4).

Djokovic improved to 20-2 this year and 90-8 since the start of 2011. He didn’t lose a set in six rounds at Key Biscayne.

“I’m playing at the peak of my form ... the best tennis that I have played,” Djokovic said. “I have to use that as much as I can.”

He also won the tournament in 2007 and last year. Only six-time champion Andre Agassi has more men’s titles at Key Biscayne.

Mulling how to celebrate his latest trophy, Djokovic said he might violate his gluten-free diet.

“I cannot guarantee anything,” he said with a laugh. “I think I deserve a fresh bagel.”

It was Djokovic’s first championship since he won the Australian Open in January for his fifth Grand Slam title and third in a row. Now begins the clay season culminating with the French Open, the only major Djokovic has yet to win.

“This is very encouraging for me prior to the clay-court season,” he said. “I’m going to have more confidence.”

The lone break point Djokovic faced in the final came in the fifth game, and he erased that. He lost only one service point in the tiebreaker, went ahead to stay when Murray double-faulted to make it 3-2, and closed out the victory when the Scotsman sailed his final forehand long.

“I managed to play my best tennis when I needed to,” Djokovic said.

He’s enjoying his success. Warming up before a match earlier in the week, he joked with fans and used his racket handle to whack balls to them.

“Honestly, I’m not a big fan of baseball,” the Serb said with a smile. “I’m a fan of hitting the home runs with a tennis racket at the practice sessions.

“We try to come up with some crazy ideas and invent new sports on the tennis court. Yesterday we played a little tennis hockey, if you want to call it, or whatever. So we like having fun.”