Wednesday's men's cycling time trial will most likely be the final meaningful event for most of the world's top cyclists as they try to end their season on top.
The time trial presents Great Britain with a great chance to win their first gold medal of the Olympics with two strong favorites in Bradley Wiggins and Chris Froome.
After missing out on the gold in the road race with sprinter Mark Cavendish, the Brits will be looking for much better luck in the time trial.
Wiggins and Froome are not the only favorites going into Wednesday's event.
There are plenty of other riders who could pull an upset just like Kazakhstan's Alexander Vinokourov did in the road race on Saturday.