Top-ranked Serena Williams says she hasn’t practised much because of her right shoulder injury.

Williams was struggling physically during her third-round loss at the Olympics and pulled out of the hard-court warmup in Cincinnati because of the shoulder problem. She said Friday that ”I’m just now starting to feel a little bit better.”

The American says she was able to practice for only two days before the Rio Games after the shoulder started bothering her following her Wimbledon victory. She says she is doing a lot of physical therapy.

Williams is seeking her 23rd major title, which would break a tie with Steffi Graf for most in the Open era.