The 2012 London Olympic Games are history. The medals have all been presented, the closing ceremony completed and the athletes have already started returning home.
During the Games, medals were awarded in 302 different events.
Some of the events are sports that we watch and follow every year, including basketball, soccer and tennis. Meanwhile, events that are hardly discussed for four years instantly become must-watch entertainment. Some of these events include water polo, archery and team handball.
The athletes that competed in the Olympic Games have worked and trained for their entire lives for the opportunity they just experienced. A small percentage of them were fortunate enough to leave London with a medal. With even fewer of those winning a gold medal, it's important to note the chances of being a repeat gold medalist is one of the hardest accomplishments in sports.
Here are five gold-medal winners from individual events at the 2012 Olympic Games in London who will likely not win gold in Rio.
Nathan Adrian won the gold medal in the 100-meter freestyle by the slimmest of margins. A tiny 0.01-second margin of victory gave him the win over favorite James Magnussen from Australia.
Magnussen will surely be looking to redeem himself in the pool in 2016.
Stephen Kiprotich defied all the odds in the marathon at the Olympic Games in London. This wasn't only because he won Uganda's first medal when he won gold, but because he beat the Kenyan runners Abel Kirui and Wilson Kipsang.
The marathon is a difficult enough event to win once—winning twice will take an even more heroic effort for Kiprotich.
Kayla Harrison won the first gold medal for the United States in judo.
Defending her title will literally be a tough task. She will face a difficult field of competitors, including Mayra Aguiar from host country Brazil.
Allyson Felix finally won an individual gold medal when she crossed the finish line in the 200-meter dash.
Should Felix return in 2016, she will be a 29-year-old sprinter racing much younger and fresher legs.
It took Felix three trips to the Olympic Games to win her first gold, a fourth trip likely won't result in a second.
We may have seen the last golden moment for Usain Bolt.
The Jamaican accomplished what only Carl Lewis had done before by successfully defending his 100-meter gold medal.
It's even more unlikely that Bolt will become the first three-time 100-meter champion. To be successful, he will have to not only beat the competition, he will have to escape injury and father time as well.
Bolt will be 29-years-old when the Olympic Games start in Rio in 2016.