LONDON (AP) — Five things to know about Sunday, Day 9 of the London Olympics:
— Serena Williams follows her Golden Slam by joining sister Venus to become the first women with four Olympic golds, winning their third doubles title.
— McKayla Maroney of the United States takes silver in women's vault.
— Roof opened back up for Andy Murray vs. Roger Federer at Wimbledon for men's final.
— Tiki Gelana of Ethiopia wins Olympic gold medal in women's marathon.
— Britain's Olympic gold rush continues with Ben Ainslie in sailing.
Serena Williams followed her own Golden Slam by teaming with big sister Venus on Sunday to continue their dominance of Olympic women's doubles tennis.
The American sisters beat Andrea Hlavackova and Lucie Hradecka of the Czech Republic 6-4, 6-4 under the roof on a rainy afternoon at the All England Club for their third Olympic doubles gold. Venus — with her red, white and blue braids pulled back into a bun — closed out the match with a backhand volley winner after the Czechs saved a pair of match points.
"We all talk about this, 'We have so many medals,' but to be able to add to that, it's like an unbelievable feeling," Venus said. "You know that in that count, there you are. It feels amazing."
On Saturday, Serena beat Maria Sharapova 6-0, 6-1 for the singles gold. She joined Steffi Graf as the only women to complete the Golden Slam — winning the Olympics and the four majors.
When the Americans in the crowd at Centre Court broke into a chant of "U-S-A! U-S-A!" as the players left the court, the sisters each pumped their fists, turned around to wave, then slapped a high-five. The medal ceremony had to wait for the outdoor bronze-medal match, which was delayed by rain.
Serena became tennis' first double gold medalist at an Olympics since Venus won singles and doubles at the 2000 Sydney Games. The sisters also won the doubles gold at the 2008 Beijing Olympics.
Now they each have a record four Olympic tennis gold medals, and the sisters didn't drop a set through their five doubles matches at the London Games.
The Williames also became the first tennis players to win Olympic gold indoors since the 1912 Stockholm Games, a match played in a pavilion on wood courts painted black.
But with the sun back out, the roof opened for the Wimbledon rematch of Roger Federer and Andy Murray in the singles final. Federer beat Murray a month ago for his seventh Wimbledon title.
McKayla Maroney came in as the heavy favorite on vault after wining the world title last year, and she also posted the highest qualifying score in London. But the American fell on her second attempt, and Sandra Izbasa of Romania followed with the final vaults and won her second career gold.
Izbasa won the floor exercise at the Beijing Olympics.
Maroney appeared to land her second vault on her heels, and her legs quickly skidded out from under her. The crowd gasped as she plopped to the mat, and her score of 14.3 gave her an average of 15.083. Izbasa finished with an average of 15.191.
Maria Paseka of Russia won the bronze.
Tiki Gelana of Ethiopia won the women's Olympic marathon in a race that began in heavy rain, was briefly drenched in sunlight and ended in another downpour. She finished in 2 hours, 23 minutes and 7 seconds Sunday, holding off Priscah Jeptoo of Kenya by five seconds. Tatyana Petrova Arkhipova of Russia won the bronze.
Four runners bunched together over the last three miles. With the finish line ahead, Gelana made her move, grimacing as she surged to the front. With the rain falling, she kept glancing over her shoulder to see if Jeptoo was gaining ground.
Gelana coasted in and raised her hands as she crossed the line, soaking in the moment.
Shalane Flanagan was the top U.S. finisher in 10th place.
Sweden's Fredrik Loof and Max Salminen knew they won a medal Sunday after sailing across the finish line first in the medal race of the venerable Star class. They counted as the rest of the boats finished and began to celebrate once the favored British team crossed the line in eighth.
Loof and Salminen became the first champions of the London Olympics sailing regatta by shocking defending champions Iain Percy and Andrew Simpson of Britain.
The British crew had plenty of fans on a sunny day at Weymouth, England. Yet they lost the gold in the last 200 meters on the difficult Nothe Course. They were in fourth at one point but picked the wrong side of the course. In light, notoriously tricky winds, they limped painfully toward the realization that gold could slip away.
With Sweden winning, the British had to finish sixth or better to win the gold. They crossed in eighth and settled for silver, leaving the crowd hushed.
Ben Ainslie came through for Britain in the Finn class, winning gold in his fourth straight Olympics.