Canada's Eugenie Bouchard was forced to withdraw from the women's doubles and mixed doubles events at the US Open on Saturday after suffering a head injury when she slipped and fell in the locker room, putting her participation in Sunday's fourth-round women's singles match in doubt.
The 21-year-old from Montreal sustained the injury late on Friday and US Open medical personnel continue to assess the severity of the injury, US Open tournament director David Brewer said.
Medical staff recommended that Bouchard withdraw from the two doubles events and she complied with the suggestion.
Bouchard was playing alongside Australia's Nick Kyrgios in mixed doubles and Russia's Elena Vesnina in women's doubles and had taken special pride Friday in being the only woman remaining in all three events at the US Open.
Bouchard, seeded 25th, has not as yet decided whether or not to compete in her scheduled fourth-round match against Italy's Roberta Vinci but a decision was expected to be made later on Saturday after further treatment and medical evaluation.