Serena Williams has been training at Roland Garros as she steps up her preparations for the French Open.

The three-time champion has not played competitive tennis since suffering a first-round defeat to Naomi Osaka in Miami, having also been knocked out early of the Indian Wells Masters on her return from giving birth.

Williams' coach Patrick Mouratoglou acknowledged last week that the 23-time grand slam champion made her comeback too soon, but insisted she is heading to Paris to win.

And the 36-year-old was on Court Philippe Chatrier on Monday, having also practiced on the red dirt a day earlier.

Williams, who travelled to Paris after attending the wedding of Prince Harry to Meghan Markle in London on Saturday, opted not to play at the Madrid Open or the Internazionali d'Italia in the build up to the second major of the season, instead training at the Mouratoglou Tennis Academy.