Dutch professional tennis player Kiki Bertens competes against Australian professional tennis player Ashleigh Barty during a group match of WTA Finals Stock Photo - Alamy
World No. 1 Barty upset by alternate Bertens at WTA Finals
Madrid Open: Kiki Bertens overpowers Simona Halep to win first WTA Premier Mandatory title
Kiki Bertens makes most of late chance by beating world No 1 Ashleigh Barty | Tennis | The Guardian
Number one Barty beaten by last-gasp Osaka replacement Bertens at WTA Finals - Sportstar
Bertens, Sabalenka earn WTA Trophy wins | The West Australian
Tennis news - Top seed Kiki Bertens cruises into WTA Elite Trophy semis - Eurosport
Bertens battles past Zheng for Zhuhai final: 'I'm surprising myself what's still in me'
Kiki Bertens has fellow players talking about her clay-court ability
Kiki Bertens vs. Belinda Bencic | 2019 Porsche Tennis Grand Prix Second Round | WTA Highlights - YouTube
Kiki Bertens - Wikipedia
Bertens defeats Halep to win Madrid Open - Eurosport
WTA Insider on Twitter: "What an effort from Kiki Bertens. Has played every week since US Open, arrived in Shenzhen @WTAFinals on Monday after playing the Zhuhai final, gets the call to
WTA Finals: Ashleigh Barty beaten by replacement Kiki Bertens - BBC Sport
Kiki Bertens Retains Women's Singles Crown in Saint Petersburg for 10th WTA Title