Centre Court (12.30pm start)
Karolina Pliskova (CZE)  vs Caroline Wozniacki DEN 
Sloane Stephens (USA) vs Lucie Safarova (CZE)
Not Before 7pm
Elina Svitolina (UKR)  vs Garbiñe Muguruza ESP 
Caroline Garcia (FRA) vs Simona Halep (ROU) 
Grandstand (12 noon start)
Anna-Lena Groenefeld (GER)/ Kveta Peschke CZE  vs Yung-Jan Chan (TPE)/ Martina Hingis (SUI) 
Ekaterina Makarova (RUS)/ Elena Vesnina RUS  vs Lyudmyla Kichenok (UKR)/ Nicole Melichar (USA)
Gabriela Dabrowski (CAN)/ Jelena Ostapenko (LAT) vs Lucie Safarova (CZE)/ Barbora Strycova CZE 
Of the four former champions entered in Toronto, only Caroline Wozniacki and Simona Halep remain after defeats for Petra Kvitova and Agnieszka Radwanska.
Halep beat four top-20 opponents en route to winning last year's title, including WTA World No.2 Angelique Kerber in the semifinals.
Elina Svitolina leads the WTA for most singles titles won in 2017 following successes in Rome, Taipei City, Dubai and Istanbul.
Sloane Stephens has returned to form in Toronto having suffered first-round defeats in her two previous tournaments - at Washington DC (losing to Halep) and at Wimbledon (losing to Alison Riske).