Jack Sock called the surface at the Citi Open "probably the worst court on tour" after losing to Kevin Anderson 63 64 in the semifinals on Saturday.
Despite winning his first three matches at the hard-court tuneup for the U.S. Open, Sock said he was upset about the conditions in Washington all week.
"Pretty shocking tennis court," Sock said. "I don't think I'll be back at this tournament probably in the future. It's probably the worst court of the year. Speed, bounces, everything. It's pretty shocking."
Sock, ranked 19th, has played this tournament every year since 2013.
