2021 Singapore Tennis Open – Doubles
# 2021 Singapore Tennis Open – Doubles

The Singapore Tennis Open was a new addition to the ATP Tour in 2021.

Sander Gillé and Joran Vliegen won the title, defeating Matthew Ebden and John-Patrick Smith in the final, 6–2, 6–3.

## Seeds

* Sander Gillé / Joran Vliegen (champions)
* Rohan Bopanna / Ben McLachlan (first round)
* Luke Bambridge / Dominic Inglot (semifinals)
* Matthew Ebden / John-Patrick Smith (final)

## Draw

### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Draw

| First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | S Gillé J Vliegen | $7^7$ | 6 | | | | | | | | | | | | | |
| | E King H Reese | $6^3$ | 3 | 1 | S Gillé J Vliegen | 6 | $7^7$ | | | | | | | | | |
| | S-w Kwon Y Uchiyama | | | | P Raja R Ramanathan | 4 | $6^3$ | | | | | | | | | |
| | P Raja R Ramanathan | w/o | | | | | | | 1 | S Gillé J Vliegen | 6 | 6 | | | | |
| 3 | L Bambridge D Inglot | 6 | 6 | | | | | | 3 | L Bambridge D Inglot | 4 | 4 | | | | |
| | Y Hanfmann J Millman | 3 | 3 | 3 | L Bambridge D Inglot | $7^7$ | $7^7$ | | | | | | | | | |
| WC | J Cerretani A Shamasdin | 6 | 7 | WC | J Cerretani A Shamasdin | $6^4$ | $6^1$ | | | | | | | | | |
| | A Bublik M Polmans | 1 | 5 | | | | | | | | | | 1 | S Gillé J Vliegen | 6 | 6 |
| | R Galloway A Lawson | 7 | 6 | | | | | | | | | | 4 | M Ebden J-P Smith | 2 | 3 |
| | T Daniel J Jung | 5 | 3 | | R Galloway A Lawson | 4 | 6 | [5] | | | | | | | | |
| Alt | T-S Kwiatkowski C Eubanks | 4 | 2 | 4 | M Ebden J-P Smith | 6 | 3 | [10] | | | | | | | | |
| 4 | M Ebden J-P Smith | 6 | 6 | | | | | | 4 | M Ebden J-P Smith | 6 | 6 | | | | |
| WC | S Alam R Hobbs | 5 | 1 | | | | | | | LD Martínez D Vega Hernández | 4 | 4 | | | | |
| | S Balaji L Margaroli | 7 | 6 | | S Balaji L Margaroli | 4 | 6 | [10] | | | | | | | | |
| | LD Martínez D Vega Hernández | 6 | 6 | | LD Martínez D Vega Hernández | 6 | 2 | [12] | | | | | | | | |
| 2 | R Bopanna B McLachlan | 4 | 2 | | | | | | | | | | | | | |
