Name: Frederik Nielsen
Country: Denmark
Birthdate: 27.08.83, 40 years
Height: 190 cm
Weight: 76 kg
Profi since: 2001
Right-handed
ATP ranking: 616
TOP ranking's position: 190 (15.08.11, 274 points)
Points: 3
Prize money: 1368011 $
Matches total: 929
Win: 564
%: 60.71 %
Country: Denmark
Birthdate: 27.08.83, 40 years
Height: 190 cm
Weight: 76 kg
Profi since: 2001
Right-handed
ATP ranking: 616
TOP ranking's position: 190 (15.08.11, 274 points)
Points: 3
Prize money: 1368011 $
Matches total: 929
Win: 564
%: 60.71 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2021 | 0/1 | 0/1 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2020 | 3/1 | 0/0 | 2/0 | 1/1 | 0/0 | 0/0 | 0/0 |
| 2019 | 1/2 | 1/2 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2018 | 29/19 | 14/11 | 0/0 | 12/7 | 0/0 | 3/1 | 0/0 |
| 2017 | 40/24 | 26/16 | 0/0 | 12/8 | 2/0 | 0/0 | 0/0 |
| 2016 | 47/21 | 29/14 | 0/0 | 14/4 | 3/2 | 1/1 | 0/0 |
| 2015 | 31/29 | 17/13 | 0/0 | 7/10 | 0/1 | 7/5 | 0/0 |
| 2014 | 45/19 | 23/9 | 0/0 | 18/5 | 4/4 | 0/1 | 0/0 |
| 2013 | 22/20 | 10/7 | 0/4 | 9/6 | 0/0 | 3/3 | 0/0 |
| 2012 | 20/20 | 13/9 | 0/1 | 1/6 | 1/1 | 5/3 | 0/0 |
| 2011 | 37/28 | 9/10 | 12/7 | 9/8 | 2/1 | 5/2 | 0/0 |
| 2010 | 46/26 | 14/10 | 18/10 | 8/3 | 6/3 | 0/0 | 0/0 |
| 2009 | 44/27 | 23/12 | 1/1 | 16/10 | 3/2 | 1/2 | 0/0 |
| 2008 | 37/26 | 12/6 | 2/5 | 12/8 | 8/4 | 3/3 | 0/0 |
| 2007 | 41/24 | 5/4 | 7/6 | 23/8 | 0/3 | 6/3 | 0/0 |
| 2006 | 48/26 | 10/5 | 7/2 | 18/10 | 6/5 | 3/3 | 4/1 |
| 2005 | 42/23 | 14/6 | 6/3 | 13/5 | 0/1 | 9/7 | 0/1 |
| 2004 | 29/24 | 2/3 | 7/7 | 13/8 | 7/6 | 0/0 | 0/0 |
| 2003 | 1/3 | 0/0 | 1/1 | 0/1 | 0/1 | 0/0 | 0/0 |
| 2002 | 1/1 | 0/0 | 0/0 | 1/1 | 0/0 | 0/0 | 0/0 |
| 2001 | 0/1 | 0/0 | 0/0 | 0/1 | 0/0 | 0/0 | 0/0 |
| TOTAL | 564/365 | 222/138 | 63/47 | 187/110 | 42/34 | 46/34 | 4/2 |
| perc. % | 60.71 % | 61.67 % | 57.27 % | 62.96 % | 55.26 % | 57.5 % | 66.67 % |
Frederik Nielsen / scheduled / last
| no matches found |
Frederik Nielsen form
Frederik Nielsen / last 50 matches
| 06.03.21 | q 1 | Ramkumar Ramanathan | Frederik Nielsen | 6-4, 6-1 |  | match details |  Doha | Hard |
| 18.07.20 | 1st round | Frederik Nielsen | Sebastian Mortier | 6-4, 6-3 |  | match details |  All Lower | Clay |
| 17.07.20 | 1st round | Frederik Nielsen | Sebastian Fanselow | 3-6, 7-65, 6-2 | | match details | ||
| 07.03.20 | Frederik Nielsen | Ignacio Garcia | 7-65, 6-2 | | match details |  Davis Cup | I. hard | |
| 09.02.20 | q 1 | Go Soeda | Frederik Nielsen | 6-1, 6-2 | | match details |  New York | I. hard |
| 13.03.19 | 1st round | Peter Polansky | Frederik Nielsen | 7-67, 6-3 | | match details | Phoenix Challenger | Hard |
| 11.03.19 | qual. | Frederik Nielsen | Fabrice Martin | 6-4, 7-65 | | match details | ||
| 31.12.18 | 1st round | Daniel Masur | Frederik Nielsen | 6-1, 5-7, 6-4 | | match details |  Noumea Challenger | Hard |
| 08.10.18 | qual. | Kevin King | Frederik Nielsen | 6-4, 6-3 | | match details | Fairfield Challenger | Hard |
| 07.10.18 | q 2 | Frederik Nielsen | Thai Kwiatkowski | 6-73, 6-3, 7-5 | | match details | ||
| 06.10.18 | q 1 | Frederik Nielsen | Roberto Ortega-Olmedo | 6-2, 6-2 | | match details | ||
| 29.09.18 | q 1 | Alexander Ritschard | Frederik Nielsen | 6-4, 7-66 | | match details | Stockton Challenger | Hard |
| 22.09.18 | q 1 | Alexander Sarkissian | Frederik Nielsen | 6-4, 7-5 | | match details | Tiburon Challenger | Hard |
| 08.09.18 | q 1 | Evan Song | Frederik Nielsen | 6-2, 7-63 | | match details | Cary Challenger | Hard |
| 02.09.18 | q 2 | Kaichi Uchida | Frederik Nielsen | 6-3, 6-4 | | match details | Chicago Challenger | Hard |
| 02.09.18 | q 1 | Frederik Nielsen | Joris De Loore | 7-64, 2-6, 7-5 | | match details | ||
| 07.08.18 | 1st round | Lucas Miedler | Frederik Nielsen | 6-3, 6-2 | | match details |  Portoroz Challenger | Hard |
| 06.08.18 | qual. | Frederik Nielsen | Albano Olivetti | 6-2, 7-65 | | match details | ||
| 05.08.18 | q 2 | Frederik Nielsen | Andrea Pellegrino | 6-0, 6-0 | | match details | ||
| 04.08.18 | q 1 | Frederik Nielsen | Matic Dimic | 7-5, 6-0 | | match details | ||
| 29.07.18 | q 2 | Karim-Mohamed Maamoun | Frederik Nielsen | 7-65, 3-6, 6-2 | | match details |  Segovia Challenger | Hard |
| 28.07.18 | q 1 | Frederik Nielsen | Alexander Zhurbin | 6-2, 6-3 | | match details | ||
| 12.06.18 | 1st round | Adrian Menendez-Maceiras | Frederik Nielsen | 6-4, 7-68 | | match details |  Nottingham Challenger | Grass |
| 11.06.18 | qual. | Frederik Nielsen | Dominik Koepfer | 1-6, 6-4, 6-1 | | match details | ||
| 10.06.18 | q 2 | Frederik Nielsen | Austin Krajicek | 6-3, 7-61 | | match details | ||
| 09.06.18 | q 1 | Frederik Nielsen | Daniil Zarichanskyy | 6-3, 6-1 | | match details | ||
| 22.05.18 | 1st round | David Guez | Frederik Nielsen | 6-2, 6-4 | | match details | Loughborough Challenger | I. hard |
| 21.05.18 | qual. | Frederik Nielsen | Johannes Haerteis | 7-62, 6-1 | | match details | ||
| 20.05.18 | q 2 | Frederik Nielsen | Simon Carr | 6-3, 6-4 | | match details | ||
| 19.05.18 | q 1 | Frederik Nielsen | Remi Boutillier | 6-72, 7-610, 6-1 | | match details | ||
| 14.05.18 | qual. | Yosuke Watanuki | Frederik Nielsen | 1-6, 6-4, 6-0 | | match details |  Busan Challenger | Hard |
| 13.05.18 | q 2 | Frederik Nielsen | Wishaya Trongcharoenchaikul | 6-75, 6-4, 6-0 | | match details | ||
| 12.05.18 | q 1 | Frederik Nielsen | Makoto Ochi | 6-1, Makoto Ochi - retired | | match details | ||
| 28.04.18 | q 1 | Yong-Kyu Lim | Frederik Nielsen | 6-4, 6-1 | | match details | Seoul Challenger | Hard |
| 07.04.18 | Rubber 1 | Karim-Mohamed Maamoun | Frederik Nielsen | 3-6, 6-3, 7-66 | | match details | Davis Cup | I. hard |
| 12.03.18 | q 1 | Frederik Nielsen | Pavel Krainik | Pavel Krainik - walk over | | match details |  Drummondville Challenger | I. hard |
| 12.03.18 | q 2 | Frederik Nielsen | Hugo Grenier | 4-6, 7-66, 4-1, Hugo Grenier - retired | | match details | ||
| 12.03.18 | qual. | Aleksandar Vukic | Frederik Nielsen | 6-2, 6-4 | | match details | ||
| 06.03.18 | 1st round | Jared Hiltzik | Frederik Nielsen | 6-4, 4-6, 6-2 | | match details | Canada F2 | I. hard |
| 05.03.18 | q 2 | Frederik Nielsen | Luis David Martinez | 6-3, 6-4 | | match details | ||
| 05.03.18 | qual. | Frederik Nielsen | Ricardo Rodriguez-Pace | 3-6, 6-3, 6-4 | | match details | ||
| 27.02.18 | 1st round | Deiton Baughman | Frederik Nielsen | 6-3, 6-3 | | match details | Canada F1 | I. hard |
| 14.02.18 | 2nd round | Ronnie Schneider | Frederik Nielsen | 6-2, 6-4 | | match details | Great Britain | I. hard |
| 13.02.18 | 1st round | Frederik Nielsen | Yannick Jankovits | 6-2, 3-6, 6-3 | | match details | ||
| 09.02.18 | 1/4 | Maximilian Neuchrist | Frederik Nielsen | 6-2, 6-3 | | match details | Great Britain | I. hard |
| 08.02.18 | 2nd round | Frederik Nielsen | Neil Pauffley | 6-4, 7-5 | | match details | ||
| 07.02.18 | 1st round | Frederik Nielsen | Nicholas S. Hu | 3-6, 6-4, 7-63 | | match details | ||
| 04.02.18 | Frederik Nielsen | Peter Bothwell | 6-1, 6-1 | | match details | Davis Cup | I. hard | |
| 03.02.18 | Rubber 1 | Frederik Nielsen | Simon Carr | 6-3, 7-62 | | match details | ||
| 10.01.18 | 2nd round | Evgeny Karlovskiy | Frederik Nielsen | 6-4, 6-2 | | match details |  Bangkok Challenger | Hard |