Serena Williams(L, front) of the United States poses with her trophy during the awarding ceremony after the women's singles match against Garbine Muguruza of Spain at the 2015 Wimbledon Championships in Wimbledon, London, Britain, on July 11, 2015. Serena Williams won 2-0 to claim the title. [Photo/Xinhua]

LONDON - Serena Williams won her sixth Wimbledon women's singles title with a 6-4, 6-4 victory over Spain's Garbine Muguruza here on Saturday.

Williams, 33, survived an early scare in the first set from the 20th seed after she was broken in the opening game. She broke back in the eighth game to pull it even at 4-4.

The world No. 1 held her serve and broke again to win the first set.

The American then took control of second set to go ahead 5-1. But Muguruza, playing her first Grand Slam, made a strong comeback, breaking Williams twice to make it 5-4.

Muguruza, who upset Williams in last year's French Open second round, dropped her serve finally and saw her opponent win her fourth consecutive Grand Slam tournament and 21st in total.

"I'm just happy it was such a great match, " William said. "I can't believe I'm standing here with another Serena slam."

The Serena slam means that she holds all four grand slam titles at the same time. She did it for the first time from winning the 2012 French Open champion to taking the 2003 Australian Open trophy.