The winner makes an appearance on the balcony (Jimmie48/WTA)

Snapped in Cincy: All the best photos as Keys is crowned champion

It was a case of lucky 13 for Bianca Andreescu, whose victory at the Rogers Cup has propelled her up the ranking to WTA World No.14. (Jimmie48/WTA)

Rankings rockets: Toronto champ Andreescu charges into Top 15

Bianca Andreescu became the first Canadian to win the Rogers Cup in 50 years at Toronto 2019, starting by winning four consecutive three-setters and taking the final after Serena Williams was forced to retire (Getty)

Local heroines: Andreescu becomes latest WTA home champion

However, Serena Williams bounced back to make her first Tour final post-maternity leave, defeating Marie Bouzkova in three sets (Getty)

Triumphant in Toronto: Serena, Andreescu set up blockbuster final

Weeks later, at the French Open, Halep gained revenge, cruising to a 6-2, 6-2 quarterfinal success. (Getty)

Rivalry record: Simona Halep vs Svetlana Kuznetsova

Kiki Bertens is the defending champion at the Western and Southern Open, having beaten Simona Halep 2-6, 7-6(6), 6-2 in the 2018 final (Getty)

From Jankovic to Bertens: A decade of Cincinnati champions

Donna Vekic also captured her second win from match point down in 2019 in the first round of Toronto, facing triple match point as Madison Keys served for the win at 5-4 in the second set but coming back to triumph 3-6, 7-6(5), 7-6(5) (Jimmie48/WTA)

Great escapes: Vekic, Riske win from match point down for second time in 2019

Washington champion Jessica Pegula, pictured with her very good girl Maddie, rises to a new career high of No.55 with her first trophy (Mike Lawrence @CitiOpen)

Rankings Rockets: First-time titlists Pegula, Zheng hit career highs

Simona Halep is the defending Rogers Cup champion (Getty)

From Dementieva to Halep: A decade of Rogers Cup champions

There was also success for Elina Svitolina, who overcame Daria Kasatkina, 6-3, 6-1. (Jimmie48/WTA)

Hitting the hard courts: The best photos from San Jose and Washington DC

Jil Teichmann climbs 28 places to World No.54 after winning the Ladies Open Palermo (Getty)

Rankings rockets: Jump for Jil Teichmann, Kawa climbs

17-year-old Hailey Baptiste grew up just five minutes away from the Washington venue - and made a stunning debut as a wildcard, ousting World No.17 Madison Keys in the first round (Mike Lawrence/Citi Open)

Welcome to the Tour: Baptiste scores Keys win on WTA debut