PORTLAND, Ore. — Jack Sock needed a little time to get up to speed Friday in his first Davis Cup match.
Once Sock got his serve straightened out, the U.S. raced to a 2-0 lead over Croatia in the best-of-five quarterfinal tie.
Sock overcame a two-set deficit to beat Marin Cilic 4-6, 3-6, 6-3, 6-4, 6-4, and John Isner topped Borna Coric 6-4, 6-4, 6-3 in the second match on the Tualatin Hills hard court.
The U.S. can wrap up the Davis Cup tie Saturday with a win in the doubles match between twins Bob and Mike Bryan and Ivan Dodig and Marin Draganja. Two reverse singles matches are scheduled for Sunday.
“Our mindset is we’re happy,” U.S. captain Jim Courier said. “For us, it’s about putting our hard hats on and let Bob and Mike do what they do. I like our chances.”
The U.S-Croatia winner will advance to the semifinals in September to face the Czech Republic-France winner. The United States is seeking its first semifinals appearance since 2012.
The United States is 157-3 when leading 2-0 in Davis Cup competition. The last…