US Open 2018, Day 6: Match Points

LEARNING
Two Grand Slam champions meet as Maria Sharapova faces Jelena Ostapenko. The Russian won the US Open back in 2006; the Latvian is looking for her maiden title here.
The pair met for the first time earlier this year, on the clay in the Rome quarterfinal; Sharapova won 6-7(6), 6-4, 7-5.
Angelique Kerber is a former titlist here, winning in 2016. If she wins this year, she will become the ninth woman in the Open era to win Wimbledon and the US Open back to back.
LOOK: Flourishing in Flushing - Two decades of US Open champions
Her rivalry with Dominika Cibulkova stretches back over a decade. The German leads the head-to-head 7-5; Cibulkova has beaten her only once in the last five years.
Madison Keys and Aleksandra Krunic have played twice previously, with a win apiece - but not since 2015, when the American won 6-4, 6-0 in Stanford.
WEATHER
Cloudy, with a chance of showers in the evening.
TRENDING
— Serena Williams (@serenawilliams) September 1, 2018
Late night victory feels good 👊⭐️🗽 pic.twitter.com/CNRZCgmSIQ
— Karolina Pliskova (@KaPliskova) September 1, 2018
Second week feels 🙈✨🗽 @usopen pic.twitter.com/AacwA0Alyg
— Ash Barty (@ashbar96) September 1, 2018
READING
The Wall Street Journal covers Angelique Kerber's quest for another Slam title.
For Tennis.com, Steve Tignor assesses how Serena turned her match with sister Venus into their most one-sided.
And the New York Times look at the Williams sisters as a match-up for the ages.
ORDER OF PLAY
See Saturday's full order of play here.