John Isner's moment has arrived. How long can he make it last? Steve Tignor wonders after the American's shocking win over Roger Federer. Story | Podcast: More on Isner, Davis Cup | Ticker: Federer denies he criticized Wawrinka

In transition last year, the U.S. Davis Cup team appears to have entered a new era under the leadership of confident captain Jim Courier. Bodo | USA sweeps Switzerland | Reaction: Doubles win | Isner d. Federer | Fish d. Wawrinka

At the very least, Davis Cup provides some priceless pictures. Richard Pagliaro selected the best of the bunch for his weekend recap. Photo Spotlight | Video: Davis Cup Highlights | The Fed Cup in Photos | Our Davis Cup Memories

Who had the best weekend in Davis Cup? It may have been Ivo Karlovic, writes Ed McGrogan, who also discusses Caroline Garcia's tour return. First Serve, Jan. 13 | Karlovic wins tie-deciding match | Garcia: Remember this?