Nick Kyrgios was defeated in three sets by Reilly Opelka in a battle of the big servers at the Canadian Open ©Getty Images

Australia's Nick Kyrgios was defeated in three sets by Reilly Opelka of the United States in a battle of the big servers as the Canadian Open continued today with singles and doubles action in both the men's and women's tournaments.

Kyrgios was knocked out of the tournament by Opelka 4-6, 7-6, 6-4, with the American hitting 22 aces past Kyrgios who had 16 of his own.

Meanwhile Opelka's compatriot Tommy Paul overcame a tough first set to beat Canadian Vasek Pospisil 6-7, 6-2, 6-3.

World number 26 Dan Evans of Britain fell to a 6-4, 6-4 straight sets defeat with Kazakhstan's Alexander Bublik hitting eight aces past his opponent and he progressed to the round of 32.

In the women's singles, Britain's Harriet Dart advanced in straight sets, 7-5, 7-6 against Leylah Annie Fernandez of Canada.

Seeded American player, Madison Keys was upset 6-3, 6-3 by Canadian Rebecca Marino.

World number 19 and Australian Open semi-finalist Karolína Muchová of Czech Republic was shocked by Océane Dodin, the world ranked number 107.

The French player won 6-3, 1-6, 6-2 despite conceding 10 double faults.

Coco Gauff is seeded 15th for the women's singles ©Getty Images
Coco Gauff is seeded 15th for the women's singles ©Getty Images

In the women's doubles, Indonesian Beatrice Gumulya and Britain's Emily Webley-Smith were swept aside 6-2, 6-3 by Canadian pair Carol Zhao and Melodie Collard.

Hong Kong-born British player Tara Moore and Emina Bektas of the United States defeated Belgium's Alison Van Uytvanck and Polona Hercog of Slovenia 6-3, 5-7, 10-7.

Americans Coco Gauff and Jessica Pegula lost 6-2, 6-4 in the women's doubles to Russian Veronika Kudermetova and Elena Rybakina of Kazakhstan.

However, the 17-year-old prodigy has an opportunity to redeem herself in the women's singles as she takes on Latvian Anastasija Sevastova tomorrow.

Despite winning a first set tiebreak in the men's doubles, Britain's Jamie Murray and his Australian partner Max Purcell were eventually overcome by Purcell's compatriot Luke Saville and Dutchman Matwé Middelkoop 6-7, 6-1, 13-11 in the men's doubles.

Another British-Australian duo faltered as Cameron Norrie and Alex de Minaur were defeated by Serbian Dušan Lajović and Olympic silver medallist Aslan Karatsev of Russia.

Lajović and Karatsev won 6-4, 6-7, 10-8 in what was a tight fixture characterised by thrilling rallies.

The Association of Tennis Professionals (ATP) Tour Masters 1000 and the Women’s Tennis Association (WTA) 1000 tournaments are taking place simultaneously this week, with men's competition being held at the Aviva Centre in Toronto and women's action at the IGA Stadium in Montreal.