Serena Williams returns to action in 2016 Hopman Cup in Australia

New Delhi: Serena Williams will return to action at the Hopman Cup in Australia in January 2016. She will team up with Jack Sock for Team USA in the mixed team event.

The world number one has not played since her losing to Roberta Vinci at the US Open last month. The semi-final defeat to the Italian ended her her bid to complete a calendar grand slam.

"I want to play doubles at #AusOpen so it'll be exciting for me to get experience at #HopmanCup" @serenawilliams pic.twitter.com/XpO2gYhHMe

— Hopman Cup (@hopmancup) October 21, 2015

Then, she pulled out of two events in China earlier this month, as well as the season ending WTA Finals in Singapore, citing the need for a proper rest after a grueling year.

In an impressive year for the 34-year-old American claimed three Grand Slam singles titles, increasing her count to 21, which is two behind Steffi Graf's Open Era record of 22, and third on the all-time list behind Margaret Court's 24.

Her win-loss record for 2015 stands at 53-3, and will finish the year as world number for the fifth time, for a total of 263 weeks, sitting third all-time behind Graf and Martina Navratilova.

Last year, she teamed up with big-serving John Isner to make the finals in Perth, but they were beaten by Poland in the final.