![Joe Salisbury (left) and Frederik Nielsen during their doubles match on day four of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy Joe Salisbury (left) and Frederik Nielsen during their doubles match on day four of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy](https://c8.alamy.com/comp/P7DRFK/joe-salisbury-left-and-frederik-nielsen-during-their-doubles-match-on-day-four-of-the-wimbledon-championships-at-the-all-england-lawn-tennis-and-croquet-club-wimbledon-P7DRFK.jpg)
Joe Salisbury (left) and Frederik Nielsen during their doubles match on day four of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy
![Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (l) and Tim Pütz in action. Credit: Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (l) and Tim Pütz in action. Credit:](https://c8.alamy.com/comp/T77MR5/munich-germany-05th-may-2019-tennis-atp-tour-munich-doubles-men-finals-demoliner-brazil-and-sharan-india-nielsen-denmark-and-ptz-germany-frederik-nielsen-l-and-tim-ptz-in-action-credit-sven-hoppedpaalamy-live-news-T77MR5.jpg)
Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (l) and Tim Pütz in action. Credit:
![Frederik Nielsen and Joe Salisbury during the doubles on day eight of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy Frederik Nielsen and Joe Salisbury during the doubles on day eight of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy](https://c8.alamy.com/comp/P8BG5C/frederik-nielsen-and-joe-salisbury-during-the-doubles-on-day-eight-of-the-wimbledon-championships-at-the-all-england-lawn-tennis-and-croquet-club-wimbledon-P8BG5C.jpg)
Frederik Nielsen and Joe Salisbury during the doubles on day eight of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy
![Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863114. Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863114.](https://previews.123rf.com/images/salajean/salajean1302/salajean130200012/17863114-tennis-player-frederik-nielsen-in-action-at-a-davis-cup-match-romania-beats-denmark-with-3-0.jpg)
Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863114.
![Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863174. Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863174.](https://previews.123rf.com/images/salajean/salajean1302/salajean130200011/17863174-tennis-player-frederik-nielsen-in-action-at-a-davis-cup-match-romania-beats-denmark-with-3-0.jpg)
Tennis Player Frederik Nielsen In Action At A Davis Cup Match, Romania Beats Denmark With 3:0 Stock Photo, Picture And Royalty Free Image. Image 17863174.
![Danish Frederik Nielsen pictured in action during the game of Danish Nielsen and German Puetz against It Danish Frederik Nielsen pictured in action during the game of Danish Nielsen and German Puetz against It](https://www.imago-images.com/bild/sp/0048863113/w.jpg)
Danish Frederik Nielsen pictured in action during the game of Danish Nielsen and German Puetz against It
![Frederik Nielsen and Joe Salisbury (right) during the doubles on day five of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy Frederik Nielsen and Joe Salisbury (right) during the doubles on day five of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy](https://c8.alamy.com/comp/P7HPRB/frederik-nielsen-and-joe-salisbury-right-during-the-doubles-on-day-five-of-the-wimbledon-championships-at-the-all-england-lawn-tennis-and-croquet-club-wimbledon-P7HPRB.jpg)
Frederik Nielsen and Joe Salisbury (right) during the doubles on day five of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy
![Jonathan Marray and Frederik Nielsen are excited to be taking on the world's best at the ATP World Tour finals | Tennis News | Sky Sports Jonathan Marray and Frederik Nielsen are excited to be taking on the world's best at the ATP World Tour finals | Tennis News | Sky Sports](https://e0.365dm.com/12/07/2048x1152/Frederik-Nielsen-and-Jonny-Marray-doubles-cha_2792175.jpg)
Jonathan Marray and Frederik Nielsen are excited to be taking on the world's best at the ATP World Tour finals | Tennis News | Sky Sports
![Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (r) and Tim Pütz in action. Credit: Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (r) and Tim Pütz in action. Credit:](https://c8.alamy.com/comp/T77N0M/munich-germany-05th-may-2019-tennis-atp-tour-munich-doubles-men-finals-demoliner-brazil-and-sharan-india-nielsen-denmark-and-ptz-germany-frederik-nielsen-r-and-tim-ptz-in-action-credit-sven-hoppedpaalamy-live-news-T77N0M.jpg)
Munich, Germany. 05th May, 2019. Tennis: ATP-Tour - Munich, doubles, men, finals: Demoliner (Brazil) and Sharan (India) - Nielsen (Denmark) and Pütz (Germany). Frederik Nielsen (r) and Tim Pütz in action. Credit:
![Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 6/7/12 Men's Doubles - Great Britain's Jonathan Marray (R) and Denmark's Frederik Nielsen during their semi final match Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 6/7/12 Men's Doubles - Great Britain's Jonathan Marray (R) and Denmark's Frederik Nielsen during their semi final match](https://c8.alamy.com/comp/2EGB0WG/tennis-wimbledon-all-england-lawn-tennis-croquet-club-wimbledon-england-6712-mens-doubles-great-britains-jonathan-marray-r-and-denmarks-frederik-nielsen-during-their-semi-final-match-mandatory-credit-action-images-andrew-couldridge-livepic-2EGB0WG.jpg)
Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 6/7/12 Men's Doubles - Great Britain's Jonathan Marray (R) and Denmark's Frederik Nielsen during their semi final match
![Tennis: Former doubles champion Frederik Nielsen out of Wimbledon over Covid-19 contact | The Straits Times Tennis: Former doubles champion Frederik Nielsen out of Wimbledon over Covid-19 contact | The Straits Times](https://static1.straitstimes.com.sg/s3fs-public/styles/large30x20/public/articles/2021/06/27/2021-06-25t161759z_366263214_up1eh6p199xt4_rtrmadp_3_tennis-wimbledon.jpg?VersionId=FG61nr0dE7YF344ZrtI448UwflLaR.X9)