Steve Johnson, Frances Tiafoe and Mike Bryan also named to squad.
The 2017 champion offered no excuses after bowing in the quarterfinals.
From first ball to last, keep up with all the action on Day 9 quarterfinal of the 2018 U.S. Open with the live blog sponsored by Tecnifibre.
Wimbledon winner on why he has mental edge over arch rivals.
Quarterfinal action kicks off on Day 9, with Sloane Stephens and Juan Martin del Potro headling the day and Serena Williams and Rafael Nadal headlining the night.
Today on the Lucky Letcord Podcast we break down the tennis we've seen over Labor Day weekend, hearing from Nick Kyrgios, Alexander Zverev, Sloane Stephens and more!
From first ball to last, keep up with all the action on Day 8 of the 2018 U.S. Open with the live blog sponsored by Tecnifibre.
