2021 Mercer Tennis Classic – Doubles
# 2021 Mercer Tennis Classic – Doubles

Katarzyna Kawa and Magdalena Fręch were the defending champions but Fręch chose not to participate. Kawa partnered alongside Tereza Mihalíková, but they lost in the first round to Emily Appleton and Fernanda Contreras.

Quinn Gleason and Catherine Harrison won the title, defeating Alycia Parks and Alana Smith in the final, 6–2, 6–2.

## Seeds

* Katarzyna Kawa / Tereza Mihalíková (first round)
* Quinn Gleason / Catherine Harrison (champions)
* Conny Perrin / Renata Zarazúa (semifinals)
* Hailey Baptiste / Whitney Osuigwe (quarterfinals)

## 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 | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | K Kawa T Mihalíková | 2 | 2 | | | | | | | | | | | | | | | |
| | E Appleton F Contreras | 6 | 6 | | | E Appleton F Contreras | 2 | 6 | [8] | | | | | | | | | |
| | A Parks A Smith | 2 | 6 | [10] | | A Parks A Smith | 6 | 2 | [10] | | | | | | | | | |
| | E Arango M Brengle | 6 | 3 | [2] | | | | | | | A Parks A Smith | 3 | 7 | [10] | | | | |
| 4 | H Baptiste W Osuigwe | 6 | 6 | | | | | | | | A Myers I Popovic | 6 | 5 | [4] | | | | |
| | J-h Choi N-l Han | 3 | 3 | | 4 | H Baptiste W Osuigwe | 2 | 3 | | | | | | | | | | |
| | A Myers I Popovic | w/o | | | | A Myers I Popovic | 6 | 6 | | | | | | | | | | |
| | E Tchakarova V Tchakarova | | | | | | | | | | | | | | | A Parks A Smith | 2 | 2 |
| | Jia Lu Xiy Wang | 6 | 6 | | | | | | | | | | | | 2 | Q Gleason C Harrison | 6 | 6 |
| WC | M Courville A García Fernández | 1 | 0 | | | Jia Lu Xiy Wang | 3 | 6 | [7] | | | | | | | | | |
| | R Anderson V Duval | 6 | 3 | [2] | 3 | C Perrin R Zarazúa | 6 | 3 | [10] | | | | | | | | | |
| 3 | C Perrin R Zarazúa | 3 | 6 | [10] | | | | | | 3 | C Perrin R Zarazúa | 4 | 5 | | | | | |
| | H Chang E Mandlik | 6 | 4 | [15] | | | | | | 2 | Q Gleason C Harrison | 6 | 7 | | | | | |
| | N Hanatani M Uchijima | 0 | 6 | [17] | | N Hanatani M Uchijima | $6^2$ | 4 | | | | | | | | | | |
| | L Cabrera P Hon | 2 | $6^3$ | | 2 | Q Gleason C Harrison | $7^7$ | 6 | | | | | | | | | | |
| 2 | Q Gleason C Harrison | 6 | $7^7$ | | | | | | | | | | | | | | | |
