Victoria Azarenka confirmed her withdrawal from next week’s Aegon Open Nottingham because of injury.

More: Serena Williams Confirms Reports that she Has Been Bothered by an Adductor Injury

The tournament said that Azarenka has spent the past two days at the Nottingham Tennis Centre practicing on grass, but has been unable to rehabilitate the right knee injury that she suffered at Roland Garros. The No. 4 seed retired in the third set of her first-round match against Italy’s Karin Knapp at Roland Garros.

“I am very disappointed to have to withdraw from Nottingham,” Azarenka said in a statement. “Although I came here a few days ago to prepare and start training, my knee is unfortunately not yet completely healed and ready to play at 100 percent. I had been very much looking forward to playing here in front of the fans in Nottingham at this great event. I have been made to feel so welcome by everyone here and the facilities, including the grass courts, have been excellent, but hope to have a chance to come back next year instead.”