First up in the women's event, Petra Kvitova, who knocked out Britain's Konta, takes on Flavia Pennetta.
That's followed by second seed Simona Halep against Victoria Azerenka.
Andy Murray's conquerer Kevin Anderson faces Stanislas Wawrinka and Roger Federer meets Richard Gasquet of France
Serena has come out on top in the battle between the Williams sisters.
She beat Venus 6-2 1-6 6-3 to make the semi-final.
Novak Djokovic is through to the semi-finals – but it took four sets and a 1am finish to do it.
He won 6-1, 3-6, 6-3, 7-6 against Spain's Feliciano Lopez.
