The 2016 Estoril Open (also known as the Millennium Estoril Open for sponsorship purposes) was a tennis tournament played on outdoor clay courts. It was the second edition of the Estoril Open, and part of the ATP World Tour 250 series of the 2016 ATP World Tour. The event took place at the Clube de Ténis do Estoril in Cascais, Portugal, from 25 April until 1 May 2016. Unseeded Nicolás Almagro won the singles title.
| 2016 Estoril Open | |
|---|---|
| Date | 25 April – 1 May |
| Edition | 2nd |
| Draw | 28S / 16D |
| Prize money | €463,520 |
| Surface | Clay |
| Location | Cascais, Portugal |
| Venue | Clube de Ténis do Estoril |
| Champions | |
| Singles | |
 Nicolás Almagro | |
| Doubles | |
 Eric Butorac / Scott Lipsky | |
Finals edit
Singles edit
Nicolás Almagro defeated Pablo Carreño Busta, 6–7(6–8), 7–6(7–5), 6–3
Doubles edit
Eric Butorac / Scott Lipsky defeated 
Łukasz Kubot / Marcin Matkowski, 6–4, 3–6, [10–8]
Singles main draw entrants edit
Seeds edit
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 FRA
|
Gilles Simon | 18 | 1 |
 AUS
|
Nick Kyrgios | 20 | 2 |
| FRA
|
Benoît Paire | 22 | 3 |
 POR
|
João Sousa | 34 | 4 |
| ESP
|
Guillermo García-López | 37 | 5 |
 CRO
|
Borna Ćorić | 41 | 6 |
 ARG
|
Leonardo Mayer | 45 | 7 |
| ESP
|
Pablo Carreño Busta | 49 | 8 |
- Rankings are as of April 18, 2016.
Other entrants edit
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Withdrawals edit
Gilles Müller → replaced by Daniel Gimeno-Traver- Tommy Robredo → replaced by
Benjamin Becker 
Jo-Wilfried Tsonga → replaced by Michael Berrer
Dmitry Tursunov → replaced by 
Rogério Dutra Silva
Doubles main draw entrants edit
Seeds edit
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 POL
|
Łukasz Kubot | POL
|
Marcin Matkowski | 45 | 1 |
 PHI
|
Treat Huey |  BLR
|
Max Mirnyi | 49 | 2 |
| ESP |
ESP |
||||
| USA
|
Eric Butorac | USA
|
Scott Lipsky | 91 | 4 |
 ISR
|
Jonathan Erlich |  GBR
|
Colin Fleming | 107 | 5 |
- Rankings are as of April 18, 2016.
Other entrants edit
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates:
Withdrawals edit
- Before the tournament
- Marc López (abductor injury)