Angelique Kerber will be the top-ranked player on Monday, supplanting Serena Williams after the American withdrew from Indian Wells pre-tournament. However, Kerber could be called an off-form high-ranked player right now
The 2017 Australian Open starts on Monday with the draw coming up in a matter of days. One player that I think is looking exceptionally dangerous is the Czech Republic's Karolina Pliskova.
Angelique Kerber found her way to the top ranked spot in women's tennis, so she'll be primed and ready to take on Karolina Pliskova Saturday at the 2016 US Open.