Former world number one Venus Williams is through to the semifinals of the season ending WTA finals in Singapore.

She made progress after pulling out a gutsy 7-5, 6-4 win over Spanish world number two Garbine Muguruza to end with a 2-and-one record in the white group.

The victory enabled Williams, who won this event in 2008, to advance along with pool winner Karolina Pliskova……who won her first two matches but ended round-robin play with a 6-3 6-1 loss to Jelena Ostapenko.

Play yesterday saw Caroline Wozniacki advancing from the red group with one round of matches remaining.

The trio of Simona Halep, Caroline Garcia and Elina Svitolina can all still qualify alongside the Dane when play concludes in that pool tomorrow.