SINGAPORE - All week we've been bringing you 10 Things To Know heading into each day at the BNP Paribas WTA Finals Singapore presented by SC Global, and this one's no different - in fact this may be the biggest one of them all, because it's down to Finals Day at the WTA's crown jewel event.
So let's get ready for an absolutely massive final right here and right now on wtatennis.com!
1) The head-to-head looks lopsided, but Radwanska has an ace up her sleeve...
Kvitova leads the overall head-to-head, 6-2, but they're 2-2 at the WTA Finals, meeting four times in the round robin stage before (Kvitova led 2-1 in Istanbul and Radwanska leads 1-0 in Singapore).
2) The winner of this match will be in the year-end Top 5.
The year-end Top 4 is locked in - Serena Williams, Simona Halep, Garbiñe Muguruza and Maria Sharapova. But No.5 is up for grabs - the WTA Finals champion will be No.5, the runner-up No.6.
3) One of these players will achieve a big WTA Finals first.
Since the WTA Finals switched to a round robin format in 2003, no player has gone 1-2 in the round robin stage and gone on to win the title. Both Kvitova and Radwanska went 1-2 in the round robin.
4) Radwanska is going for the biggest title of her career.
To date, Radwanska's biggest titles are Premier Mandatories at Beijing in 2011 and Miami in 2012. She's never won one of the five biggest tournaments (the four Grand Slams and the WTA Finals).
5) Radwanska is trying to become the first non-Grand Slam champion to win here since...
Amélie Mauresmo - the Frenchwoman was the last player without a Grand Slam title to their name to win the WTA Finals. It didn't take her long to shake that tag, though - she went on to win her first two Grand Slam titles in the next three Grand Slam events, at the Australian Open and Wimbledon in 2006.
6) Kvitova has won titles this big before.
Kvitova has three titles at this level or higher - two Grand Slams at Wimbledon in 2011 and 2014, and a WTA Finals title in 2011. She's actually 3-0 in her career in finals at this level or higher.
7) Both players have sparkling records in finals.
Kvitova is 17-5 in her career in WTA Finals (.773) while Radwanska is 16-7 (.696).
8) Both players will surpass $20 million in career prize money after this.
Kvitova and Radwanska have both assured themselves of passing $20 million in career prize money by reaching the final here. They're the 12th and 13th players in WTA history to achieve the feat.
9) Kvitova is trying to become the fifth player to win the WTA Finals in different cities.
She conquered Istanbul in 2011 and is now trying conquer Singapore. Only four players have ever won WTA Finals titles in multiple cities: Martina Navratilova in two cities (Oakland and New York City), Kim Clijsters in two cities (Los Angeles and Doha), Chris Evert in three cities (Boca Raton, Los Angeles and New York City) and Serena Williams in four cities (Munich, Doha, Istanbul and Singapore).
10) Find out where you can watch the final live on WTA TV developed by Xerox.