Simona Halep leads the head-to-head against Kiki Bertens 3-1, but the pair have never previously played on outdoor hard courts. The Dutchwoman's sole victory was in the 2012 Fès semifinals on clay 6-3, 6-4; Halep took their most recent encounter, in last year's Rome semifinals, 7-5, 6-1, as well as an early meeting in the 2010 ITF $100,000 event in Torhout, Belgium on indoor hard courts and at Wimbledon 2016.
Simona Halep is on a nine-match winning streak following her title last week in Montreal, and has won 18 of her last 19 matches going back to Roland Garros. The World No.1's longest winning streak to date is 14, set in February and March 2015 as she won titles in Dubai and Indian Wells, followed up by a semifinal in Miami.
Before Montreal last week, Kiki Bertens' record against Top 10 players on hard courts was 0-10. But after beating Karolina Pliskova and Petra Kvitova in Canada, the Dutchwoman has followed it up this week by defeating Caroline Wozniacki, Elina Svitolina and Kvitova again, taking her Top 10 record on hard courts to 5-0 in the past fortnight. Victory over Simona Halep today would take that to 6-0, as well as being Bertens' first ever win over a World No.1 and her 13th Top 10 win overall.
Victory for Simona Halep would take her tally of 2018 titles to four, having already won titles in Shenzhen, Roland Garros and Montreal. It would be her second-most trophies in any single season, only behind the six she racked up in 2013.
All seven of Kiki Bertens' previous WTA finals have come on clay. Prior to this year, the 26-year-old had never reached a final above International level, but 2018 has seen her tick off a few new milestones: a first Premier title in Charleston, a first Premier Mandatory final in Madrid and now a first final on hard courts here.
Simona Halep is guaranteed to remain at World No.1 on Monday. Kiki Bertens is guaranteed to rise back up to World No.15, matching the career high she set in May, but a title would propel her to a new career high of World No.13.
ORDER OF PLAY
CENTER (starts 2pm)
Simona HALEP (ROU)  vs Kiki BERTENS (NED)