Five-time singles champion Venus Williams showed up at Wimbledon on the eve of the championships, sparking speculation over what role she will play.

The 42-year-old American has played just one tournament since losing to Ons Jabeur in the second round at Wimbledon last year.

That lone appearance came at the Chicago Open in August, when she was beaten in her opening match by Hsieh Su-wei.

Williams has not made a retirement announcement, and it may be that she intends to play an active part in Wimbledon, although she has not entered the women's singles or women's doubles.

The American great has seven grand slams among her 49 career singles titles and has won six Wimbledon doubles crowns with sister Serena Williams, among their 14 slams as sport's greatest sister act.

One avenue that may be open to Venus is mixed doubles. She was not listed on Wimbledon's entry list for the invitational doubles, an event for veterans. The mixed doubles line-up has yet to be revealed.

Williams was pictured at Wimbledon by a Getty photographer at the All England Club, carrying a red sports bag, and later in the evening posted on Instagram that she was at a Red Hot Chili Peppers concert at London Stadium.

Serena has entered the singles on a wildcard, having made her competitive comeback on doubles duty alongside Jabeur at Eastbourne after being absent from the tour since last year's Wimbledon. She is a seven-time singles champion at London's grass-court grand slam.