Serena Williams of the U.S. (C) poses with her gold medal along with silver medallist Maria Sharapova of Russia (L) and bronze medallist Victoria Azarenka of Belarus during the presentation ceremony at the All England Lawn Tennis Club during the London 2012 Olympic Games August 4, 2012. Serena Williams dominates Maria Sharapova to cap career Golden Slam Serena Williams, playing some of the most dominant tennis the sport has ever seen, won the gold medal at the Olympics on Saturday morning, defeating Maria Sharapova 6-0, 6-1 at Wimbledon and capping the career Golden Slam. She became the second woman to win all four majors and Olympic gold. Steffi Graf completed the feat in 1988. En route to the gold, Serena played the most dominant stretch of tennis in her illustrious career: In the third round, she defeated former world No. 2 Vera Zvonareva 6-1, 6-0. Caroline Wozniacki, a former No. 1, went down 6-0, 6-3 in the quarterfinals. The current No. 1, Victoria Azarenka, was a 6-1, 6-2 victim in the semifinals. And then on Saturday, against the reigning French Open champion, recent No. 1 and international superstar, Serena was nearly perfect. There were sarcastic cheers when Sharapova finally won a game at 0-6, 1-3. Overall, she lost just 17 games in the tournament. Roger Federer lost more in one set on Friday. Serena now has a seven-match winning streak against her Russian counterpart. It's said only two things bother Sharapova: wind and Serena. She got both today. The whipping wind didn't help her serve and led to an early break, which set the tone for the match. "I don't think it's her," Serena said of Sharapova after the match, "I just think today I played well." She won 13 straight matches this year at the All England Club, seven at Wimbledon and six at the Olympics. [h=1]Tennis: Williams sisters win third doubles gold[/h] LONDON (Reuters) - Serena and Venus Williams retained the Olympic tennis women's doubles gold with a 6-4 6-4 win over Czech duo Andrea Hlavackova and Lucie Hradecka on Sunday, becoming the first tennis players ever to win four golds each. The American sisters, who also won doubles gold in Beijing and Sydney, took an hour and a half to wrap up their defeat of the number four seeds under the Centre Court roof. "There's something about standing next to Venus and holding that gold medal. Three times we have played, three times we have got the gold medal. So we are pretty stoked about it," said Serena, who also won the women's singles gold on Saturday. The Czech pair saved two match points before Venus secured the victory with a backhand volley, hugging her sister in celebration as chants of "USA! USA!" rang out from the crowd. With Venus also having won singles gold in Sydney, the pair have overtaken previous record holder Briton Reginald Doherty, who won a total of three golds in 1900 and 1908. "It's incredible. After coming off Serena's victory I think most of all we are happy to add to our country's medal count and be a part of it. Wow. It just feels unreal," said Venus, who is already thinking about adding a fourth doubles gold to the collection at the 2016 Games. "We're definitely planning on Rio. We're going out with a bang in Rio. Hopefully we will make it four, you never know." Later their U.S. team mates and top seeds Liezel Huber and Lisa Raymond will take on Russia's Maria Kirilenko and Nadia Petrovafor the bronze medal.