Watson battles through
British No 1 Heather Watson advanced to the second round of the Rogers Cup with a 6-4 5-7 6-4 win over Tereza Smitkova.
The first set was a topsy-turvy affair but Watson prevailed, breaking her Czech opponent's serve three times.
The 22-year-old from Guernsey was not as clinical in the second as she took just one of four break points and that was enough to let world No 93 Smitkova back into the match.
But Watson, ranked 36 places above Smitikova, held her nerve to take the third and advance to a second-round meeting with either 10th seed Dominika Cibulkova or Francoise Abanda.
Also on Monday, Germany's Sabine Lisicki knocked out 13th seed Sara Errani 6-1 7-5.
Italian Errani, the 2012 French Open runner-up, is a clay court expert whilst Lisicki prefers cement, so the result was not the upset it looks on paper.
Lisicki, 29 in the world, hit the fastest recorded serve in WTA history (131 mph) last week at Stanford.
Errani was serving for the second set at 5-3 but let the lead slip away, the German wining four straight games to advance.
She will have a tough second-round match against either Svetlana Kuznetsova - who won the Washington Open title on Sunday - or rising American star Madison Keys.
American qualifier Shelby Rogers defeated Ajla Tomljanovic 6-4 7-6 (7-5) to set up a second-round meeting with the star attraction of this year's event, fifth seed and Canada's new sporting heroine Eugenie Bouchard.
That match is expected to be played Tuesday night.
Elsewhere Barbora Zahlavova Strycova beat Roberta Vinci 7-5 7-5 and the Czech will face third seed Agnieszka Radwanska in the next round.
Alize Cornet beat qualifier Lauren Davis 6-3, 7-5 and will next face eighth seed Victoria Azarenka, and Klara Koukalova beat Dutch qualifier Kiki Bertens 7-5 7-6 (7-5).