The 34-year-old Russian, a twice Grand Slam winner who is 108th in the world rankings, announced her withdrawal from the July 27-August 4 event on her Instagram account.

“Unfortunately I had to pull out of Washington due to my problems with US visa,” Kuznetsova wrote. “Wanted to apologize to all my fans who were waiting for me there.

“Never had issues like this in my life, hopefully, one day I can finally get a visa and play at least some events of the US swing!”

The WTA did not immediately respond when asked to comment.

Kuznetsova, who won the US Open in 2004 and French Open in 2009, collected the most recent of her 18 WTA singles titles last year in the US capital when she saved four match points to beat Croatian Donna Vekic.

The Russian has lost the opening match in each of her last three tournaments, including at Wimbledon and the French Open.