Caroline Wozniacki
Serena Williams, Caroline Wozniacki win 1st doubles match
They're friends, they're former World No. 1s in singles and on Monday they became doubles partners for the first time as Serena Williams and Caroline Wozniacki teamed to win a first round match at the ASB Classic in Auckland.
Former No. 1 Wozniacki to retire after Australian Open
Former No. 1 and 2018 Australian Open champion Caroline Wozniacki will retire from professional tennis after competing in Melbourne next year.