CENTRE COURT (starts 5pm)
Gabriela DABROWSKI (CAN) / Jelena OSTAPENKO (LAT) vs Barbora KREJCIKOVA (CZE) / Katerina SINIAKOVA (CZE)
Not Before 7pm
 Caroline WOZNIACKI (DEN) vs  Petra KVITOVA (CZE)
Monique ADAMCZAK (AUS) / Lyudmyla KICHENOK (UKR) vs  Andreja KLEPAC (SLO) / María José MARTÍNEZ SÁNCHEZ (ESP)
World No.1 and Australian Open champion Caroline Wozniacki takes on Petra Kvitova's 11-match winning streak in today's semifinal. It is the 13th encounter between the two players, and Kvitova leads the head-to-head 7-5 - including 6-3 on hard courts and their only prior Middle East meeting, a 6-3, 6-4 win in the 2013 Dubai semifinals.
Kvitova has also won the pair's last three matches in straight sets; Wozniacki's most recent victory was a 6-2, 6-3 triumph in the round robin stages of the 2014 WTA Finals. In fact, only two of their previous 12 encounters have gone to a deciding set - and both of those finished with identical scorelines, Kvitova winning their 2012 Montréal semifinal and Wozniacki taking their 2013 Cincinnati third round by 3-6, 6-2, 6-3.
Caroline Wozniacki is seeking to make her third Doha final today, having been runner-up in 2011 to Vera Zvonareva and in 2017 to Karolina Pliskova. This year marks the first time Petra Kvitova has progressed to the final four, having lost quarterfinals in 2013 to Serena Williams, in 2014 to Jelena Jankovic and in 2015 to Carla Suárez Navarro.
Petra Kvitova is on a winning streak of 11 matches including her title run in St. Petersburg, two Fed Cup rubbers and victories this week. It's the joint second-longest winning streak of the Czech's career; a win today would ensure it stands alone in second place behind her 14-match streak of 2011-12, when she won Linz, the WTA Finals, two rubbers in the Fed Cup final and Sydney.
Victory today would mark the first final at Premier 5 level or above for Petra Kvitova since her title in Wuhan in October 2016 - and the biggest final of her comeback from the knife injuries she sustained in a home invasion that year.