| Singles | |
|---|---|
| 2015 Knoxville Challenger | |
| Champion |  Daniel Evans |
| Runner-up |  Frances Tiafoe |
| Final score | 5–7, 6–1, 6–3 |
Adrian Mannarino was the defending champion, but chose not to compete this year.
Daniel Evans won the title , defeating Frances Tiafoe in the final 5–7, 6–1, 6–3 .
Malek Jaziri (first round) Austin Krajicek (second round) Tim Smyczek (second round) Ryan Harrison (first round)
James Duckworth (quarterfinals) John-Patrick Smith (second round)
Alejandro Falla (first round)
Blaž Rola (second round)| Semifinals | Final | ||||||||||||
| Dennis Novikov | 4 | 4 | |||||||||||
| Frances Tiafoe | 6 | 6 | |||||||||||
| Frances Tiafoe | 7 | 1 | 3 | ||||||||||
| Daniel Evans | 5 | 6 | 6 | ||||||||||
| Jared Donaldson | 3 | 4 | |||||||||||
| Daniel Evans | 6 | 6 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Jaziri | 1 | 2 | ||||||||||||||||||||||||
| WC | S Kozlov | 6 | 6 | WC | S Kozlov | 3 | 64 | ||||||||||||||||||||
| Q | D Smethurst | 5 | 5 | D Novikov | 6 | 77 | |||||||||||||||||||||
| D Novikov | 7 | 7 | D Novikov | 7 | 6 | ||||||||||||||||||||||
| WC | M McDonald | 4 | 3 | 5 | J Duckworth | 5 | 4 | ||||||||||||||||||||
| Q | S Bangoura | 6 | 6 | Q | S Bangoura | 6 | 3 | 4 | |||||||||||||||||||
 F Nielsen | 62 | 4 | 5 | J Duckworth | 4 | 6 | 6 | ||||||||||||||||||||
| 5 | J Duckworth | 77 | 6 | D Novikov | 4 | 4 | |||||||||||||||||||||
| 4 | R Harrison | 2 | 4 | F Tiafoe | 6 | 6 | |||||||||||||||||||||
| B Kavčič | 6 | 6 | B Kavčič | 4 | 6 | 1 | |||||||||||||||||||||
| WC | Luis Valero | 6 | 1 | 3 | F Tiafoe | 6 | 4 | 6 | |||||||||||||||||||
| F Tiafoe | 3 | 6 | 6 | F Tiafoe | 6 | 3 | |||||||||||||||||||||
 M Michalička | 1 | 3 | T Sandgren | 2 | 0r | ||||||||||||||||||||||
| T Sandgren | 6 | 6 | T Sandgren | 6 | 3 | 6 | |||||||||||||||||||||
 G Lapentti | 6 | 3 | 4 | 8 | B Rola | 4 | 6 | 3 | |||||||||||||||||||
| 8 | B Rola | 4 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | A Falla | 65 | 65 | ||||||||||||||||||||||||
| L Broady | 77 | 77 | L Broady | 6 | 2 | 6 | |||||||||||||||||||||
| WC | H Reese | 1 | 0 |  M Zverev | 3 | 6 | 3 | ||||||||||||||||||||
| M Zverev | 6 | 6 | L Broady | 4 | 4 | ||||||||||||||||||||||
| J Donaldson | 6 | 4 | 6 | J Donaldson | 6 | 6 | |||||||||||||||||||||
| Q | E Quigley | 4 | 6 | 4 | J Donaldson | 7 | 78 | ||||||||||||||||||||
| SE | T Paul | 4 | 4 | 3 | T Smyczek | 5 | 66 | ||||||||||||||||||||
| 3 | T Smyczek | 6 | 6 | J Donaldson | 3 | 4 | |||||||||||||||||||||
| 6 | J-P Smith | 6 | 6 | D Evans | 6 | 6 | |||||||||||||||||||||
| T Fritz | 4 | 4 | 6 | J-P Smith | 64 | 4 | |||||||||||||||||||||
| Q |  A Bossel | 66 | 611 | B Fratangelo | 77 | 6 | |||||||||||||||||||||
| B Fratangelo | 78 | 713 | B Fratangelo | 4 | 64 | ||||||||||||||||||||||
| D Nguyen | 2 | 6 | 3 | D Evans | 6 | 77 | |||||||||||||||||||||
| D Evans | 6 | 2 | 6 | D Evans | 6 | 6 | |||||||||||||||||||||
| SE | N Rubin | 5 | 3 | 2 | A Krajicek | 3 | 2 | ||||||||||||||||||||
| 2 | A Krajicek | 7 | 6 | ||||||||||||||||||||||||
Albert Costa defeated Juan Carlos Ferrero in the final, 6–1, 6–0, 4–6, 6–3 to win the men's singles tennis title at the 2002 French Open.
Carlos Moyá defeated Àlex Corretja in the final, 6–3, 7–5, 6–3 to win the men's singles tennis title at the 1998 French Open.
Petr Korda defeated Marcelo Ríos in the final, 6–2, 6–2, 6–2 to win the men's singles tennis title at the 1998 Australian Open. It was Korda's only major title, and Ríos' only major final.
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Dominik Hrbatý was the defending champion of the singles event at the Heineken Open tennis tournament, held in Auckland, New Zealand, but lost in the first round to Gilles Elseneer.
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Juan Ignacio Chela was the defending champion but did not compete that year.
Sjeng Schalken was the defending champion but lost in the first round to Taylor Dent.
Paul-Henri Mathieu was the defending champion but lost in the semifinals to Taylor Dent.
Katarina Srebotnik and Nenad Zimonjić were the defending champions but lost to Casey Dellacqua and Scott Lipsky in the final 7–6(8–6),4–6,[10–7]. This was the only major championship won by either Dellacqua or Lipsky in their careers.
Agnieszka Radwańska was the defending champion, but lost 6–0, 6–3 in the semifinals to the eventual champion Serena Williams.
Caroline Wozniacki was the defending champion, but she chose not to participate this year.
Agnieszka Radwańska won the title, defeating Anastasia Pavlyuchenkova in the final, 6-7(6-8), 6-3, 6-4
Anna-Lena Grönefeld and Jean-Julien Rojer were the defending champions, but lost in the second round to Chan Yung-jan and John Peers.
Anastasia Pavlyuchenkova was the defending champion, but lost to Svetlana Kuznetsova in the final, 2–6, 1–6.
Viktor Troicki was the defending champion and successfully defended his title, defeating Grigor Dimitrov in the final, 2–6, 6–1, 7–6(9–7).
Elina Svitolina was the defending champion, but chose not to participate this year.
Irina-Camelia Begu was the defending champion, but lost in the second round to Jana Čepelová.
Dominic Thiem was the defending champion, but chose not to participate this year.
Tomáš Berdych was the two-time defending champion, but withdrew before the competition began.