The United States Tennis Association on Thursday was found mostly liable for when Canadian player Eugenie Bouchard slipped on a wet locker room floor at the 2015 US Open and hit her head, suffering what she said was a “serious head injury” that changed the course of her career.

A jury found Bouchard was partially at fault for what happened. It determined the USTA was 75 percent to blame and Bouchard was 25 percent to blame. What that means will be decided in another phase of the trial to determine damages, starting Friday.