| Singles | |
|---|---|
| 2016 Heilbronner Neckarcup | |
| Champion |  Nikoloz Basilashvili |
| Runner-up |  Jan-Lennard Struff |
| Final score | 6–4, 7–6(7–3) |
Alexander Zverev was the defending champion, but chose not to defend his title.
Nikoloz Basilashvili won the title after defeating Jan-Lennard Struff 6–4, 7–6(7–3) in the final.
Ričardas Berankis (first round)
Horacio Zeballos (first round)
Albert Montañés (semifinals) Daniel Muñoz de la Nava (first round)
Yoshihito Nishioka (first round) Jan-Lennard Struff (final) Dustin Brown (first round)
Igor Sijsling (quarterfinals)| Semifinals | Final | ||||||||||||
 Jozef Kovalík | 6 | 4 | 3 | ||||||||||
| Nikoloz Basilashvili | 1 | 6 | 6 | ||||||||||
| Nikoloz Basilashvili | 6 | 77 | |||||||||||
| 6 | Jan-Lennard Struff | 4 | 63 | ||||||||||
| 3 | Albert Montañés | 0 | 3 | ||||||||||
| 6 | Jan-Lennard Struff | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | R Berankis | 3 | 6 | 3 | |||||||||||||||||||||||
 M İlhan | 6 | 1 | 6 | M İlhan | 6 | 2 | 3 | ||||||||||||||||||||
| WC |  J Tipsarević | 5 | 3 | C Berlocq | 2 | 6 | 6 | ||||||||||||||||||||
| C Berlocq | 7 | 6 | C Berlocq | 1 | 4 | ||||||||||||||||||||||
 A Rublev | 2 | 2 | J Kovalík | 6 | 6 | ||||||||||||||||||||||
 F Škugor | 6 | 6 | F Škugor | 65 | 2 | ||||||||||||||||||||||
| J Kovalík | 6 | 4 | 6 | J Kovalík | 77 | 6 | |||||||||||||||||||||
| 5 | Y Nishioka | 2 | 6 | 3 | J Kovalík | 6 | 4 | 3 | |||||||||||||||||||
| 4 | D Muñoz de la Nava | 4 | 1 | N Basilashvili | 1 | 6 | 6 | ||||||||||||||||||||
| N Basilashvili | 6 | 6 | N Basilashvili | 64 | 6 | 77 | |||||||||||||||||||||
| Q | P Torebko | 6 | 2 | 3 |  B Rola | 77 | 3 | 65 | |||||||||||||||||||
| B Rola | 3 | 6 | 6 | N Basilashvili | 6 | 3 | 6 | ||||||||||||||||||||
| WC | M Marterer | 77 | 6 | 8 | I Sijsling | 2 | 6 | 4 | |||||||||||||||||||
| Q | A Beck | 62 | 2 | WC | M Marterer | 2 | 4 | ||||||||||||||||||||
| A Menéndez-Maceiras | 1 | 68 | 8 | I Sijsling | 6 | 6 | |||||||||||||||||||||
| 8 | I Sijsling | 6 | 710 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | D Brown | 3 | 6 | 2 | |||||||||||||||||||||||
| LL |  Yannik Reuter | 6 | 3 | 6 | LL | Y Reuter | 6 | 6 | |||||||||||||||||||
| G Soeda | 4 | 5 | WC | Y Maden | 3 | 4 | |||||||||||||||||||||
| WC | Y Maden | 6 | 7 | LL | Y Reuter | 1 | 4 | ||||||||||||||||||||
| N Kicker | 6 | 6 | 3 | A Montañés | 6 | 6 | |||||||||||||||||||||
| Q | K Krawietz | 4 | 2 | N Kicker | 3 | 1 | |||||||||||||||||||||
| Q |  H Laaksonen | 4 | 3 | 3 | A Montañés | 6 | 6 | ||||||||||||||||||||
| 3 | A Montañés | 6 | 6 | 3 | A Montañés | 0 | 3 | ||||||||||||||||||||
| 6 | J-L Struff | 77 | 78 | 6 | J-L Struff | 6 | 6 | ||||||||||||||||||||
| M Zverev | 63 | 66 | 6 | J-L Struff | 7 | 63 | 6 | ||||||||||||||||||||
 R Harrison | 6 | 3 | 2 | R Olivo | 5 | 77 | 4 | ||||||||||||||||||||
| R Olivo | 3 | 6 | 6 | 6 | J-L Struff | 6 | 6 | ||||||||||||||||||||
 A González | 6 | 3 | 3 | WC | F Mayer | 2 | 3 | ||||||||||||||||||||
| F Tiafoe | 3 | 6 | 6 | F Tiafoe | 3 | 6 | 1 | ||||||||||||||||||||
| WC | F Mayer | 4 | 7 | 6 | WC | F Mayer | 6 | 1 | 6 | ||||||||||||||||||
| 2 | H Zeballos | 6 | 5 | 4 | |||||||||||||||||||||||
Björn Phau was the defending champion but decided not to participate.
Michał Przysiężny defeated Jan-Lennard Struff 4–6, 7–6(7–5), 7–6(7–5) in the final to win the title.
Two-time defending champion Rafael Nadal successfully defended his title, defeating Nicolás Almagro in the final, 6–4, 6–3. It was his record-extending eighth Barcelona Open title.
Michał Przysiężny was the defending champion, but decided to participate in 2014 U.S. National Indoor Tennis Championships instead.
Tommy Haas was the defending champion but lost to Martin Kližan in the semifinals.
Kližan went on to win the title, defeating Fabio Fognini in the final, 2–6, 6–1, 6–2.
Jan-Lennard Struff was the defending champion, but he lost in the semifinals to Alexander Zverev.
Marin Draganja and Florin Mergea were the defending champions, but Mergea decided not to participate this year. Draganja paired up with Henri Kontinen, but lost in the first round to Martin Kližan and Lukáš Rosol.
Jamie Murray and John Peers won the title, defeating Juan Sebastián Cabal and Robert Farah in the final, 2–6, 6–3, [10–8].
David Goffin was the defending champion, but withdrew before the tournament began.
Jesse Huta Galung was the defending champion, but lost in the first round to Jan-Lennard Struff.
Damir Džumhur won the title, defeating Igor Sijsling in the final, 6–1, 2–6, 6–1.
Andy Murray was the defending champion, but chose not to participate.
David Ferrer won the title, defeating Steve Johnson in the final, 4–6, 6–4, 7–5.
Taro Daniel was the defending champion but failed to defend his title, losing to Thiago Monteiro in the second round.
Jan-Lennard Struff was the defending champion but lost in the first round to Daniil Medvedev.
David Ferrer was the defending champion, but withdrew from his semifinal match against Andy Murray.
Paolo Lorenzi was the defending champion, but lost in the second round to João Sousa.
Jean-Julien Rojer and Horia Tecău were the defending champions, and successfully defended their title, defeating James Cerretani and Leander Paes in the final, 6–2, 7–6(7–2).
Jamie Murray and Bruno Soares were defending champions, but chose not to defend their title.
Ben McLachlan and Yasutaka Uchiyama were the defending champions but chose not to participate together. McLachlan played alongside Jan-Lennard Struff and successfully defended the title, defeating Raven Klaasen and Michael Venus in the final, 6–4, 7–5. Uchiyama teamed up with Joe Salisbury, but lost in the semifinals to Klaasen and Venus.
Ben McLachlan and Jan-Lennard Struff were the defending champions, but Struff chose not to participate.
Jérémy Chardy and Henri Kontinen were the defending champions, but Chardy chose not to participate this year.
Rajeev Ram and Joe Salisbury were the defending champions, but lost in the quarterfinals to John Peers and Michael Venus.
Tim Pütz and Michael Venus won the title, defeating Nikola Mektić and Mate Pavić in the final, 6–3, 6–7(5–7), [16–14], saving three championship points, in the process.