Will Roger Federer and Serena Williams add to major haul in 2017?

In grand slams, he'll make his return in time for the Australian Open, Kyrgios' home major in Melbourne.

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Will Serena Williams surpass Steffi Graf and become the first player in the Open Era to win 23 majors? 

Photos: Tennis in 2017

Will Serena Williams surpass Steffi Graf and become the first player in the Open Era to win 23 majors?

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Williams -- yes -- is also coming back. The 35-year-old hasn't played since September because of a shoulder injury. 

Photos: Tennis in 2017

Williams -- yes -- is also coming back. The 35-year-old hasn't played since September because of a shoulder injury.