| Doubles | |
|---|---|
| 2018 Delray Beach Open | |
| Champions |  Jack Sock Jackson Withrow |
| Runners-up | Nicholas Monroe  John-Patrick Smith |
| Final score | 4–6, 6–4, [10–8] |
Raven Klaasen and Rajeev Ram were the defending champions, but Ram chose not to participate and Klaasen chose to compete in Marseille instead.
Jack Sock and Jackson Withrow won the title, defeating Nicholas Monroe and John-Patrick Smith in the final, 4–6, 6–4, [10–8].
Bob Bryan / Mike Bryan (quarterfinals)
Max Mirnyi / 
Philipp Oswald (first round)
Ben McLachlan / 
Hugo Nys (semifinals) Nicholas Monroe / John-Patrick Smith (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | B Bryan M Bryan | 7 | 6 | ||||||||||||||||||||||||
| WC | T Fritz S Kozlov | 5 | 0 | 1 | B Bryan M Bryan | 6 | 3 | [5] | |||||||||||||||||||
| J Sock J Withrow | 6 | 6 | J Sock J Withrow | 3 | 6 | [10] | |||||||||||||||||||||
 L Paes P Raja | 3 | 2 | J Sock J Withrow | 63 | 77 | [10] | |||||||||||||||||||||
| 3 | B McLachlan H Nys | 77 | 77 | 3 | B McLachlan H Nys | 77 | 64 | [4] | |||||||||||||||||||
 T Huey S Johnson | 63 | 65 | 3 | B McLachlan H Nys | 3 | 6 | [10] | ||||||||||||||||||||
 W Koolhof  A Sitak | 63 | 2 | S Lipsky D Sharan | 6 | 3 | [5] | |||||||||||||||||||||
| S Lipsky D Sharan | 77 | 6 | J Sock J Withrow | 4 | 6 | [10] | |||||||||||||||||||||
| Alt |  D King A Reed | 2 | 2 | 4 | N Monroe J-P Smith | 6 | 4 | [8] | |||||||||||||||||||
 R Albot  N Basilashvili | 6 | 6 | R Albot N Basilashvili | 5 | 1 | ||||||||||||||||||||||
| J Chardy F Martin | 6 | 1 | [4] | 4 | N Monroe J-P Smith | 7 | 6 | ||||||||||||||||||||
| 4 | N Monroe J-P Smith | 3 | 6 | [10] | 4 | N Monroe J-P Smith | 77 | 2 | [10] | ||||||||||||||||||
| WC |  P Polansky D Shapovalov | 4 | 6 | [10] | M Ebden D Young | 64 | 6 | [7] | |||||||||||||||||||
 R Lindstedt  F Škugor | 6 | 3 | [2] | WC | P Polansky D Shapovalov | 3 | 7 | [3] | |||||||||||||||||||
| M Ebden D Young | 3 | 77 | [10] | M Ebden D Young | 6 | 5 | [10] | ||||||||||||||||||||
| 2 | M Mirnyi P Oswald | 6 | 61 | [5] | |||||||||||||||||||||||
Lukáš Dlouhý and Michal Mertiňák were the defending champions, but Dlouhý chose not to compete. Mertiňák played with Mikhail Elgin but lost to eventual runners-up Daniele Bracciali and Florin Mergea. Nicholas Monroe and Simon Stadler won the title 6–2, 6–4 over Bracciali and Mergea.
James Blake and Jack Sock were the defending champions, but Blake did not participate was due to his retirement from professional tennis. Sock played alongside Ryan Harrison, but lost to Bob and Mike Bryan in the semifinals.
The Bryan brothers went on to win the title, defeating František Čermák and Mikhail Elgin in the final, 6–2, 6–3.
Johan Brunström and Frederik Nielsen were the defending champions, but Nielsen chose not to participate. Brunström played alongside Nicholas Monroe, but lost in the first round to Roberto Bautista Agut and Stan Wawrinka.
Lu Yen-hsun and Jonathan Marray won the title, defeating Raven Klaasen and Leander Paes in the final, 6–3, 7-6(7–4).
Andre Begemann and Julian Knowle were the defending champions, but chose not to participate together. Begemann played alongside Florian Mayer, but lost in the first round to Dustin Brown and Jan-Lennard Struff. Knowle teamed up with Vasek Pospisil, but lost in the first round to Eric Butorac and Scott Lipsky.
Raven Klaasen and Rajeev Ram won the title, defeating Rohan Bopanna and Florin Mergea in the final, 7–6(7–5), 6–2.
The world's no.1 doubles pairing, the Bryan Brothers, were originally slated to play the event. This would have been the Bryans' first-ever appearance at Halle, after over a decade of playing in the Queen's Club Championships prior to Wimbledon. However, the Bryans withdrew just prior to the start of the tournament.
Eric Butorac and Raven Klaasen were the defending champions, but Klaasen chose not to participate. Butorac played alongside Scott Lipsky, but lost in the semifinals to Nicholas Monroe and Jack Sock.
Raven Klaasen and Marcelo Melo were the defending champions, but Melo chose to play in Beijing instead.
Raven Klaasen and Marcelo Melo were the defending champions, but decided not to participate together. Klaasen teamed up with Rajeev Ram, but they lost to Jo-Wilfried Tsonga and Nenad Zimonjić in the second round. Melo played alongside Łukasz Kubot, but they lost to Pablo Cuevas and Marcel Granollers in the second round.
Ivan Dodig and Marcelo Melo were the defending champions, but Dodig chose not to participate this year. Melo played alongside Vasek Pospisil, but lost to John Peers and Henri Kontinen in the semifinals.
Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but lost in the second round to Novak Djokovic and Viktor Troicki.
Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but withdrew before their second round match due to Herbert's leg injury.
Ivan Dodig and Marcelo Melo were the defending champions, but chose not to participate together. Melo played alongside Łukasz Kubot, but lost in the second round to Fabrice Martin and Édouard Roger-Vasselin. Dodig teamed up with Rohan Bopanna, but lost in the final to Pierre-Hugues Herbert and Nicolas Mahut, 4–6, 6–3, [6–10].
Ivan Dodig and Marcelo Melo were the defending champions, but chose not to participate together. Dodig teamed up with Rohan Bopanna, but lost in the quarterfinals to Melo who partnered Łukasz Kubot. Kubot and Melo lost in the semifinals to Jamie Murray and Bruno Soares.
Daniel Nestor and Édouard Roger-Vasselin were the defending champions but chose not to participate together. Nestor played alongside Dominic Inglot, but lost in the first round to Santiago González and Julio Peralta. Roger-Vasselin teamed up with Fabrice Martin, but lost in the quarterfinals to Wesley Koolhof and Artem Sitak.
Marcel Granollers and Jack Sock were the defending champions, but chose not to participate together this year. Granollers played alongside Ivan Dodig and successfully defended the title, defeating Fabrice Martin and Édouard Roger-Vasselin in the final, 7–5, 7–6(8–6). Sock teamed up with Nicholas Monroe, but lost to Dodig and Granollers in the semifinals.
This was the first edition of the tournament.
Raven Klaasen and Rajeev Ram were the defending champions, but chose not to participate together. Klaasen played alongside Michael Venus, but lost in the second round to Ivan Dodig and Ram. Dodig and Ram lost in the quarterfinals to John Isner and Jack Sock.
Aisam-ul-Haq Qureshi and Rajeev Ram were the defending champions but Ram chose not to participate and Qureshi chose to compete in Båstad instead.
Bob and Mike Bryan were the defending champions, but Bob Bryan could not participate due to injury. Mike Bryan played alongside Frances Tiafoe, but lost in the quarterfinals to Ryan Harrison and Rajeev Ram.
Nicholas Monroe and John-Patrick Smith were the defending champions, but chose not to participate together. Monroe played alongside Frances Tiafoe, but lost in the first round to Marcelo Arévalo and Miguel Ángel Reyes-Varela. Smith teamed up with Ben McLachlan but lost in the quarterfinals to Jack Sock and Jackson Withrow.
Jamie Murray and Bruno Soares were the defending champions, but chose not to participate together. Murray played alongside his brother Andy but lost in the quarterfinals to Raven Klaasen and Michael Venus. Soares teamed up with Mate Pavić but lost in the first round to Jean-Julien Rojer and Horia Tecău.