Nearly one million German viewers watched Kerber in WTA Finals.
The talented Aussie will undergo a "care plan" and be eligible to return to tennis in a week.
Dominic Thiem is in pole position to book a debut appearance at the World Tour Finals, but there are many in contention as the ATP moves to Paris for the final Masters event of 2016.
Former No. 1 is now mom of three kids.
The Tower of Tandil will skip Paris next week, but he wants to thank the fans before he takes his break.
The Russian knows a thing or two about a thing or two.
"There are worst things in life than losing a tennis match," says US Open finalist.
