The seeds continue to fall in Auckland, while Felix Auger-Aliassime put in an imperious showing in Adelaide.
Serena Williams needed just 44 minutes to get past Amanda Anisimova in the Auckland Open semi-finals.
After booking their place in the Auckland Classic singles semi-finals, Serena Williams and Caroline Wozniacki advanced to the doubles final.
It has been a long time coming, but best friends off court Serena Williams and Caroline Wozniacki have shown on-court chemistry in Auckland.
Former Wimbledon runner-up Eugenie Bouchard has fallen outside the world's top 250 but showed a hint of past form with a fine Auckland win.