Day 7 of the US Open marks the first day where 32 or less participants remain for each gender's singles championship.
On Sunday, Rafael Nadal, Andy Murray, Sam Stosur and Andy Roddick are some of the notable names to take the court. Just like yesterday, many players who could contend for any title will go down. All of the men's matches will be for a spot in the final 16, while the women will be competing for a quarterfinal spot.
In order to advance, players will need to be at their best, as almost every player left in the tournament knows what it's like to win at the pro level.
Here's a look at five of the biggest moments set to commence on Sunday at the Open.