Sam Querrey wins fourth set

Sam Querrey, the last U.S. man left in the tournament, had seven set points and was finally able to take the fourth set, 6-4, against Stanislas Wawrinka in a fourth-round match at Arthur Ashe Stadium.

Querrey finished off the fourth set win with two aces.

It all comes down to the fifth set and a spot in the quarterfinals.