| Singles | |
|---|---|
| 2013 Melbourne Challenger | |
| Champion |  Matthew Ebden |
| Runner-up |  Tatsuma Ito |
| Score | 6–3, 5–7, 6–3 |
This is the first edition of the event and was won by Australian Matthew Ebden defeating Tatsuma Ito in the final.
| Singles | |
|---|---|
| 2013 Melbourne Challenger | |
| Champion | Matthew Ebden |
| Runner-up | Tatsuma Ito |
| Score | 6–3, 5–7, 6–3 |
This is the first edition of the event and was won by Australian Matthew Ebden defeating Tatsuma Ito in the final.
Matthew Ebden (champions)
Stéphane Robert (first round)
Bradley Klahn (quarterfinals) Yūichi Sugita (first round) James Duckworth (semifinals) Tatsuma Ito (final) Nick Kyrgios (first round)
James Ward (semifinals)| Semifinals | Final | ||||||||||||
| 1 | Matthew Ebden | 6 | 5 | 6 | |||||||||
| 8 | James Ward | 0 | 7 | 0 | |||||||||
| 1 | Matthew Ebden | 6 | 5 | 6 | |||||||||
| 6 | Tatsuma Ito | 3 | 7 | 3 | |||||||||
| 6 | Tatsuma Ito | 4 | 6 | 710 | |||||||||
| 5 | James Duckworth | 6 | 3 | 68 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Ebden | 63 | 6 | 6 | |||||||||||||||||||||||
| Y Uchiyama | 77 | 3 | 3 | 1 | M Ebden | 1 | 7 | 6 | |||||||||||||||||||
| WC | T Kokkinakis | 6 | 6 | WC | T Kokkinakis | 6 | 5 | 1 | |||||||||||||||||||
| Q | K Takeuchi | 3 | 3 | 1 | M Ebden | 6 | 6 | ||||||||||||||||||||
| WC | Jordan Thompson | 6 | 6 | Q | B Mott | 4 | 1 | ||||||||||||||||||||
| D Propoggia | 3 | 2 | WC | J Thompson | 6 | 3 | 1 | ||||||||||||||||||||
| Q | B Mott | 6 | 7 | Q | B Mott | 4 | 6 | 6 | |||||||||||||||||||
| 7 | N Kyrgios | 3 | 5 | 1 | M Ebden | 6 | 5 | 6 | |||||||||||||||||||
| 4 | Y Sugita | 2 | 4 | 8 | J Ward | 0 | 7 | 0 | |||||||||||||||||||
| Shuichi Sekiguchi | 6 | 6 | S Sekiguchi | 3 | 2 | ||||||||||||||||||||||
 M Venus | 6 | 6 | M Venus | 6 | 6 | ||||||||||||||||||||||
| B Klein | 3 | 4 | M Venus | 6 | 62 | 4 | |||||||||||||||||||||
| A Feeney | 6 | 2 | 2 | 8 | J Ward | 3 | 77 | 6 | |||||||||||||||||||
| WC | A Whittington | 1 | 6 | 6 | WC | A Whittington | 7 | 4 | 3 | ||||||||||||||||||
| G Jones | 4 | 0 | 8 | J Ward | 5 | 6 | 6 | ||||||||||||||||||||
| 8 | J Ward | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | T Ito | 6 | 6 | ||||||||||||||||||||||||
 D Udomchoke | 3 | 4 | 6 | T Ito | 6 | 6 | |||||||||||||||||||||
 Y-k Lim | 6 | 6 | Y-k Lim | 3 | 3 | ||||||||||||||||||||||
| M Reid | 3 | 4 | 6 | T Ito | 6 | 6 | |||||||||||||||||||||
| H Moriya | 6 | 6 | 3 | B Klahn | 3 | 3 | |||||||||||||||||||||
| WC | L Saville | 4 | 1 | H Moriya | 1 | 3 | |||||||||||||||||||||
| B Mitchell | 63 | 4 | 3 | B Klahn | 6 | 6 | |||||||||||||||||||||
| 3 | B Klahn | 77 | 6 | 6 | T Ito | 4 | 6 | 710 | |||||||||||||||||||
| 5 | J Duckworth | 77 | 6 | 5 | J Duckworth | 6 | 3 | 68 | |||||||||||||||||||
| A Bolt | 62 | 3 | 5 | J Duckworth | 6 | 6 | |||||||||||||||||||||
| J Dasnières de Veigy | 4 | 4 | J Statham | 3 | 4 | ||||||||||||||||||||||
| J Statham | 6 | 6 | 5 | J Duckworth | 6 | 6 | |||||||||||||||||||||
 Y Bhambri | 6 | 6 | Y Bhambri | 3 | 4 | ||||||||||||||||||||||
| Q | J Lemke | 4 | 0 | Y Bhambri | 6 | 77 | |||||||||||||||||||||
| Q | M Banes | 78 | 1 | 6 | Q | M Banes | 1 | 65 | |||||||||||||||||||
| 2 | S Robert | 66 | 6 | 3 | |||||||||||||||||||||||
Sergei Bubka was the defending champion; however, he lost 0–6, 6–4 6–7(3–7) to Yuichi Sugita in the second round.
Sugita defeated Matthew Ebden in the final.
Florian Mayer chose to not defend his 2009 title.
Grigor Dimitrov won this year's event by beating Konstantin Kravchuk 6–1, 6–4 in the final.
Yuichi Sugita was the defending champion after defeating Matthew Ebden in the 2010 final. He was eliminated by Cedrik-Marcel Stebe already in the first round.
Stebe reached the final, but lost to Dominik Meffert 6–4, 4–6, 2–6.
Lim Yong-kyu was the defending champion, but lost to Greg Jones in the 2nd round.
Dudi Sela defeated Tatsuma Ito 6–2, 6–7(5), 6–3 in the final match.
Tatsuma Ito was the defending champion, but lost to Dudi Sela in the quarterfinals.
Sela went on to win the title by defeating Alex Bogomolov Jr. 6–1, 6–4 in the final.
Matteo Viola was the defending champion but chose not to compete. Matthew Ebden won his third Challenger of the year over Japan's Go Soeda.
Michał Przysiężny was the defending champion but decided not to participate.
Matthew Ebden was the defending champion but chose not to compete.
Matthew Ebden was the defending champion, however he chose not to participate.
Lu Yen-hsun was the defending champion, but chose not to participate.
Top seed John Millman won the title, defeating Taro Daniel in the final 6–1, 6–3.
The Keio Challenger is a professional tennis tournament played on hardcourts. It is currently part of the ATP Challenger Tour and the ITF Women's Circuit. Having been held in Yokohama, Japan since 1999. In 2015, Taro Daniel won the men's singles title, defeating Go Soeda in the final 4–6, 6–3, 6–3.
Yoshihito Nishioka won the title, defeating Alexander Kudryavtsev in the final 6–3, 6–4.
Kei Nishikori was the four-time defending champion, but chose to compete in Buenos Aires instead.
Ričardas Berankis was the defending champion but chose not to defend his title.
Chung Hyeon was the defending champion but chose not to defend his title.
James Duckworth was the defending champion but chose not to defend his title.
Yūichi Sugita was the defending champion but chose not to defend his title.
Lu Yen-hsun was the defending champion but chose not to defend his title.
Alexei Popyrin was the defending champion but chose not to defend his title.