Sunday marks the third day of track and field at the London Olympics and it will feature the sport's marquee event, as Jamaican sprinter Usain Bolt attempts to defend his 100-meter title against countryman and rival Yohan Blake.
Bolt, of course, captured the world's attention with his gold medal run in the men's 100 at the 2008 Beijing Games, but Blake has burst onto the scene in recent years to steal some of his compatriot's thunder. Blake won last year's world title in a race that Bolt was disqualified from for a false start. Bolt, who also won gold in the 200m and 400m relay four years ago in Beijing, also lost to Blake in both the 100 and 200 at the Jamaican Olympic Trials.
In addition to Bolt and Blake, the American sprinting trio of Tyson Gay, Justin Gatlin and Ryan Bailey will also be in the men's 100 final. Bailey turned in the fastest time in qualifying Saturday at Olympic Stadium, equaling a personal best with a run of 9.88 seconds.
Track and field medals will also be awarded Sunday in the women's marathon, triple jump and 400 meters, while the men also will battle for gold in the 3,000m steeplechase and hammer throw.
A rematch of the Wimbledon men's final is on tap in tennis Saturday. Last month, Roger Federer topped Great Britain's Andy Murray in four sets for his seventh Wimbledon title and 17th career grand slam victory. But with the British crowd behind him, Murray will be looking to turn the tables with a gold medal at stake.
Murray will also be playing with Laura Robson in the mixed doubles gold medal match, against Belarus' Victoria Azarenka and Max Mirnyi.
Fresh off her rout of Maria Sharapova in the women's singles gold medal match, Serena Williams will team up with sister Venus for the Olympic title in women's doubles. They play the Czech Republic's Andrea Hlavackova and Lucie Hradecka.
Bronze medal matches will take place in all three draws.
McKayla Maroney will try to extend the London Games' success of the U.S. women's gymnastics team when she takes aim at a gold medal in the vault exercise on the first day of apparatus finals on Sunday.
Maroney, the 2011 world vault champion, stuck an outstanding Amanar -- a two- and-a-half twisting back somersault -- to help Team USA capture team gold on Tuesday and is considered a vault specialist. She enters this competition as the favor to win after leading all qualification scores on the apparatus by 0.484 points.
The men will hand out gold on in two events: the men's floor exercise and the pommel horse, which gave the United States a handful of trouble during its disappointing finish in the team competition. China's Zou Kai will try to defend his 2008 Beijing Games title on the floor, while Great Britain's Louis Smith hopes to medal on the pommel horse.
In track cycling, medals will be awarded in the men's omnium, a two-day event consisting of six events. The final three events -- the individual pursuit, scratch race and kilometer time trial -- will be held Sunday. France's Bryan Coquard sits in first place.
Also on the track, the men's sprint competition continues with quarterfinals. Great Britain's Jason Kenny, reigning world champion Gregory Bauge of France, and American Jimmy Watkins are competing. The women's sprint event starts, as well.
China's Wu Minxia, chasing a record-tying sixth medal, qualified No. 1 in the semifinal of the women's 3-meter springboard and will be the overwhelming favorite to win gold Sunday.
Wu won the synchronized springboard competition with He Zi and has five career Olympic medals, one short of tying countrywoman Guo Jingjing for the most ever among female divers. She had 394.40 points Saturday to lead 12 divers who qualified for Sunday's final.
Italy's Tania Cagnotto was second and He qualified third. Canada's Jennifer Abel was fourth, followed by Americans Cassidy Krug and Christina Loukas. Another Canadian, Emilie Heymans, qualified eighth.
China has won all four diving events so far in London after going 7-for-8 in Beijing four years ago.
The second qualifier for equestrian individual jumping is Sunday as well as the first round of team jumping. On Saturday, American Beezie Madden, the 2008 bronze medalist, was knocked out of the individual jumping competition in the first qualifier after her horse, Via Volo, failed to take a jump. American teammates McLain Ward, Rich Fellers and Reed Kessler remained in the individual competition. Ward and Fellers were among 32 riders who had clean runs. Madden helped the U.S. win back-to-back gold medals in team jumping in the last two Olympics.
Sailing medals will be awarded in the men's Finn and Star classes, while a handful of others are in action.
The women's over-75kg weightlifting competition takes place, highlighted by Americans Sarah Robles and Holley Mangold.
Another shooting gold is up for grabs in the men's 50-meter pistol as Jin Jongoh of South Korea takes aim at his second Olympic title of the London Games. Jin won the men's 10m air pistol for his fourth all-time medal.
The Royal Artillery Barracks will also hold shooting action Sunday in qualifications for the men's trap.
After winning a round of 16 match Saturday, American beach volleyball stars Misty May-Treanor and Kerri Walsh Jennings are back at Horse Guards Parade for a women's quarterfinal. They play Italians Greta Cicolari and Marta Menegatti. Another U.S. team, April Ross and Jennifer Kessy, play the Czech duo of Kristyna Kolocova and Marketa Slukova.
For the first time in Olympic history, women's boxing bouts are part of the competition. All three women's classes -- flyweight, lightweight and middleweight -- have round of 16 matches. Additionally, there are men's bantamweight and heavyweight quarterfinal bouts.
The United States women's water polo team faces Italy as that competition hits the quarterfinal stage.
The men's and women's team table tennis tournaments hit the quarterfinal stage, while the synchronized swimming events get underway with women's duets.
Group play in the men's field hockey, women's handball and women's volleyball tournaments continues Sunday.
Sunday also marks the final day of preliminary action in women's basketball and all but one quarterfinal spot has been filled. The Czech Republic and Croatia, who play Angola and Turkey, respectively, will try to claim that position, while the unbeaten U.S. women will win Group A with a win over China.
Men's foil fencing will hold its team competition and the team from Italy will be trying to rebound after getting shut out in the individual tournament. China and Germany are the second and third seeds, respectively.
The wrestling portion of the 2012 London Games gets started on Sunday with a pair of weight classes in 55 and 74 kilograms.
At the lighter weight, Iran's Soryan Reihanpour, a five-time world champion, is the favorite, while Russia's Roman Vlasov and Selcuk Cebi of Turkey hope to medal.
Badminton play will come to a close at the London Games with men's singles and doubles medal matches.
China has a chance to add two more goals, with Lin Dan set to battle Malaysia's Lee Chong Wei in the singles final. On the double's side of things, Cai Yun and Fu Haifeng take on Denmark's Mathias Boe and Carsten Mogensen.