The United States was in trouble when Sam Querrey began his Davis Cup match against Thiago Alves on Sunday.
A few booming serves later, the Americans were headed for the quarterfinals.
Querrey beat Alves 4-6, 6-3, 6-4, 7-6 (3) to give the U.S. a dramatic 3-2 victory over Brazil, stepping up after teammate John Isner lost to Thomaz Bellucci to send the countries to the deciding fifth match.
''I was very happy with the way I battled through (the match),'' Querrey said. ''I fought through the tough points and got breaks in the second, third and fourth sets. I was just happy to get through it.''
Also advancing Sunday to the quarterfinals were: Canada (over Spain), Italy (over Croatia), Kazakhstan (over Austria) and the Czech Republic (over Switzerland). Clinching spots on Saturday were: France (over Israel), Serbia (over Belgium) and Argentina (over Germany).
The U.S. will host Serbia in the next round in Boise, Idaho, from April 5-7. The other three matchups for the quarterfinals ...