HOFFMAN ESTATES, Ill. — Sam Querrey gave the U.S. a commanding 2-0 lead Friday night in its Davis Cup World Group playoff against Slovakia with a 7-6 (6), 6-3, 6-3 win over Martin Klizan.

In the opening match of the night, American John Isner hit 29 aces in a 7-6 (5), 6-4, 6-2 win over Norbert Gombos.

The U.S. can ensure a trip to the 2015 World Group on Saturday by winning the doubles when it sends out U.S. Open champs Mike and Bob Bryan.

“It’s the kind of day you want to have, be comfortable 2-0 with the Bryan brothers coming up,” U.S. captain Jim Courier said. “Both Sam and Jim started off slow but finished strong. Played their best tennis at the end of the match.”