After a promising start to her US Open, advancing in the women’s singles, women’s doubles and mixed doubles draws, No. 25 seed Eugenie Bouchard has been forced to withdraw from her singles match against Roberta Vinci Sunday due to a concussion, US Open Tournament Director David Brewer said.

Bouchard pulled out of both the women’s doubles and mixed doubles events Saturday after winning her first-round women's doubles match with Elena Vesnina and her mixed doubles match with Nick Kyrgios.

“Following the competition yesterday evening, Ms. Bouchard slipped and fell in the locker room and sustained a head injury,” Brewer said in a statement. “The severity of the injury was and continues to be assessed by the on-site medical personnel at the US Open.” 

Bouchard had reached the fourth round in New York for the second straight year in her third appearance overall.

• Bouchard, Eugenie Bio