![TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys](https://c8.alamy.com/comp/2RGJ4HN/toronto-on-august-09-holger-rune-of-denmark-reacts-after-the-second-set-during-his-second-round-match-of-the-national-bank-open-part-of-the-hologic-atp-tour-at-sobeys-stadium-on-august-9-2023-in-toronto-canada-photo-by-julian-avramicon-sportswire-icon-sportswire-via-ap-images-2RGJ4HN.jpg)
TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys
![Caroline Wozniacki practiced with Holger Rune on her comeback at 2023 Canadian Open in 2023 | Caroline wozniacki, Tennis news, Caroline Caroline Wozniacki practiced with Holger Rune on her comeback at 2023 Canadian Open in 2023 | Caroline wozniacki, Tennis news, Caroline](https://i.pinimg.com/736x/26/89/0a/26890a07dd6a5bf2f36f5ee9ec189496.jpg)
Caroline Wozniacki practiced with Holger Rune on her comeback at 2023 Canadian Open in 2023 | Caroline wozniacki, Tennis news, Caroline
![Felix Auger-Aliassime beats Holger Rune to win Swiss Indoors title, Daniil Medvedev claims Vienna Open - Eurosport Felix Auger-Aliassime beats Holger Rune to win Swiss Indoors title, Daniil Medvedev claims Vienna Open - Eurosport](https://i.eurosport.com/2022/10/30/3481559-70978353-2560-1440.jpg)
Felix Auger-Aliassime beats Holger Rune to win Swiss Indoors title, Daniil Medvedev claims Vienna Open - Eurosport
![Casper Ruud's Canadian Open loss aids Holger Rune's rise to career-high ranking; Dane to enter World's top 5 for the first time Casper Ruud's Canadian Open loss aids Holger Rune's rise to career-high ranking; Dane to enter World's top 5 for the first time](https://staticg.sportskeeda.com/editor/2023/08/da699-16917462539830-1920.jpg)
Casper Ruud's Canadian Open loss aids Holger Rune's rise to career-high ranking; Dane to enter World's top 5 for the first time
![ATP Rankings: Red-hot Holger Rune cracks top 10, Felix Auger-Aliassime at career-high, Alexander Zverev slumps ATP Rankings: Red-hot Holger Rune cracks top 10, Felix Auger-Aliassime at career-high, Alexander Zverev slumps](https://d2me2qg8dfiw8u.cloudfront.net/content/uploads/2022/11/03074158/Holger-Rune-antics.jpg)
ATP Rankings: Red-hot Holger Rune cracks top 10, Felix Auger-Aliassime at career-high, Alexander Zverev slumps
The Upset bug is taking over Toronto. Rune becomes the latest victim. A very weird start to this week. Let's see how the rest of the… | Instagram
![TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys](https://c8.alamy.com/comp/2RGJ4EF/toronto-on-august-09-holger-rune-of-denmark-reacts-during-his-second-round-match-of-the-national-bank-open-part-of-the-hologic-atp-tour-at-sobeys-stadium-on-august-9-2023-in-toronto-canada-photo-by-julian-avramicon-sportswire-icon-sportswire-via-ap-images-2RGJ4EF.jpg)
TORONTO, ON - AUGUST 09: Holger Rune of Denmark reacts after the second set during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys
![Toronto, Canada. 09th Aug, 2023. Denmark's Holger Rune celebrates against United States' Marcos Giron during tennis action of the National Bank Open in Toronto, Wednesday, Aug. 9, 2023. Credit: The Canadian Press/Alamy Toronto, Canada. 09th Aug, 2023. Denmark's Holger Rune celebrates against United States' Marcos Giron during tennis action of the National Bank Open in Toronto, Wednesday, Aug. 9, 2023. Credit: The Canadian Press/Alamy](https://c8.alamy.com/comp/2RGJ38C/toronto-canada-09th-aug-2023-denmarks-holger-rune-celebrates-against-united-states-marcos-giron-during-tennis-action-of-the-national-bank-open-in-toronto-wednesday-aug-9-2023-credit-the-canadian-pressalamy-live-news-2RGJ38C.jpg)
Toronto, Canada. 09th Aug, 2023. Denmark's Holger Rune celebrates against United States' Marcos Giron during tennis action of the National Bank Open in Toronto, Wednesday, Aug. 9, 2023. Credit: The Canadian Press/Alamy
![Next Up: Holger Rune is Denmark's teenage tennis sensation - Official Site of the 2023 US Open Tennis Championships - A USTA Event Next Up: Holger Rune is Denmark's teenage tennis sensation - Official Site of the 2023 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_GettyImages-1415051081.jpg)
Next Up: Holger Rune is Denmark's teenage tennis sensation - Official Site of the 2023 US Open Tennis Championships - A USTA Event
![Caroline Wozniacki trains with compatriot Holger Rune ahead of competitive return at Canadian Open 2023 Caroline Wozniacki trains with compatriot Holger Rune ahead of competitive return at Canadian Open 2023](https://staticg.sportskeeda.com/editor/2023/07/da8f8-16908048642310-1920.jpg?w=840)
Caroline Wozniacki trains with compatriot Holger Rune ahead of competitive return at Canadian Open 2023
![Holger Rune Joins Rafael Nadal and Andrey Rublev For Unwanted 2023 Record Against American Player - The SportsRush Holger Rune Joins Rafael Nadal and Andrey Rublev For Unwanted 2023 Record Against American Player - The SportsRush](https://cdn-wp.thesportsrush.com/2023/08/289c6990-untitled-design-23.jpg)
Holger Rune Joins Rafael Nadal and Andrey Rublev For Unwanted 2023 Record Against American Player - The SportsRush
![TORONTO, ON - AUGUST 09: Holger Rune of Denmark serves during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys Stadium on August 9, TORONTO, ON - AUGUST 09: Holger Rune of Denmark serves during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys Stadium on August 9,](https://l450v.alamy.com/450v/2rgj4fj/toronto-on-august-09-holger-rune-of-denmark-serves-during-his-second-round-match-of-the-national-bank-open-part-of-the-hologic-atp-tour-at-sobeys-stadium-on-august-9-2023-in-toronto-canada-photo-by-julian-avramicon-sportswire-icon-sportswire-via-ap-images-2rgj4fj.jpg)
TORONTO, ON - AUGUST 09: Holger Rune of Denmark serves during his second round match of the National Bank Open, part of the Hologic ATP Tour, at Sobeys Stadium on August 9,
![Alcaraz, Auger-Aliassime, Rune: Could a new 'Big Three' emerge at the Australian Open? | Sporting News Canada Alcaraz, Auger-Aliassime, Rune: Could a new 'Big Three' emerge at the Australian Open? | Sporting News Canada](https://library.sportingnews.com/styles/twitter_card_120x120/s3/2023-01/nba-canada--4bb5d3f2-1880-4d3b-be88-806c25e9f66b.jpeg?itok=Cz1axYd6)
Alcaraz, Auger-Aliassime, Rune: Could a new 'Big Three' emerge at the Australian Open? | Sporting News Canada
![Félix Auger-Aliassime is the best tennis player in the world for the month of October - The Globe and Mail Félix Auger-Aliassime is the best tennis player in the world for the month of October - The Globe and Mail](https://www.theglobeandmail.com/resizer/0tGgoBDVINUkYCxNOc9JM9n2YbU=/600x0/filters:quality(80):format(jpeg)/cloudfront-us-east-1.images.arcpublishing.com/tgam/PQLTUW2RBFKNBAQI4ENLD3II2A.jpg)