Williams is a four-time winner of the Rome event, which takes place from 14-20 May. She withdrew from the Madrid Open on Thursday, saying she needs more time to prepare for her first clay season since giving birth in September.
The 23-time Grand Slam champion has not played a match on clay since reaching the final at Roland Garros in 2016. She returned to the WTA Tour in March and reached the third round at Indian Wells, where she was beaten by sister Venus, before falling in the first round of the Miami Open to Japan’s Naomi Osaka.
From BBC Sports