Serena Williams lines up first tournament since Australian Open

Williams sent social media into meltdown after appearing to confirm that she is 20 weeks pregnant.

Serena Williams is set to make her comeback from a knee injury at the Madrid Open in May.

Williams has not played competitively since winning an Open Era-record 23rd Grand Slam title at the Australian Open in January.

The legendary American withdrew from the BNP Paribas Open at Indian Wells this month, revealing that she had not been able to train due to a problem with her left knee.

Williams has been selective over which tournaments she has entered in order to give herself every chance of challenging for further major titles, but was on Tuesday included in the entry list for the Madrid Open.

The clay-court event runs May 6-13 and will give her an opportunity to gain some momentum ahead of the French Open, which begins May 28.

Maria Sharapova, who will make her return from a doping ban in Stuttgart next month, has also been invited to feature in Madrid.

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