The United States jumped to a 1-0 lead against Switzerland in their Davis Cup first round series on Friday after Mardy Fish beat Stanislas Wawrinka 6-2 4-6 4-6 6-1 9-7 in a thrilling opening singles match.
Fish found the reserves to fight back after wasting a match point chance at 5-4 in the decider, and clinched victory six games later with a cushioned, crosscourt volley winner at the net.
An 86-minute final set saw wild shifts in momentum and emotion, before the eighth-ranked American improved his record to 3-0 against the 28th-ranked Wawrinka.
Roger Federer is next on court facing 17th-ranked American John Isner before a partisan 7,000 crowd at Fribourg Forum.