"For all the moms out there who had a tough recovery from pregnancy—here you go," she wrote. "If I can do it, so can you. Love you all!!"
Williams, 36, gave birth to her daughter, Alexis Olympia Ohanian Jr., in September 2017, and has not played in a major tournament since. It was revealed last week that the 23-time Grand Slam winner had dropped from No. 1 to No. 453 in the Women's Tennis Association rankings during her maternity leave. Still, her coach said in an interview on May 14 that Williams had been "improving in all areas fast" and "will be ready" to play.
"Serena will play the French Open to win it," he said. "Can she do it? Serena can achieve anything -- after being her coach for six years, I'm even more sure of that statement."