2021 Porsche Tennis Grand Prix – Doubles
2021 tennis event results
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Ashleigh Barty and Jennifer Brady defeated Desirae Krawczyk and Bethanie Mattek-Sands in the final, 6–4, 5–7, [10–5], to win the doubles tennis title at the 2021 Stuttgart Open. By winning her 12th career WTA Tour doubles title, Barty became the first player since Lindsay Davenport in 2001 to sweep both tournaments in Stuttgart. This was also Brady's first career WTA Tour doubles title.[1]
Champions
Ashleigh Barty
Jennifer Brady
Ashleigh Barty 
Jennifer BradyRunners-up Desirae Krawczyk
Bethanie Mattek-Sands
Desirae Krawczyk Bethanie Mattek-SandsScore6–4, 5–7, [10–5]
Draw16
| Doubles | |
|---|---|
| 2021 Porsche Tennis Grand Prix | |
| Champions | Ashleigh Barty Jennifer Brady |
| Runners-up | Desirae Krawczyk Bethanie Mattek-Sands |
| Score | 6–4, 5–7, [10–5] |
| Draw | 16 |
| Seeds | 4 |
Mona Barthel and Anna-Lena Friedsam were the defending champions from when the tournament was last held in 2019,[2] but lost in the quarterfinals to Nadiia Kichenok and Raluca Olaru.
Seeds
- Desirae Krawczyk / Bethanie Mattek-Sands (final)
Xu Yifan / Zhang Shuai (quarterfinals)- Hayley Carter /
Luisa Stefani (first round) 
Lyudmyla Kichenok / 
Jeļena Ostapenko (first round)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Draw
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | D Krawczyk B Mattek-Sands
| 77 | 6 | ||||||||||||||||||||||||
 V Gracheva LI Paar
| 61 | 3 | 1 | D Krawczyk B Mattek-Sands
| 6 | 6 | |||||||||||||||||||||
 B Bencic S Kenin
| 6 | 4 | [4] |  S Fichman G Olmos
| 2 | 2 | |||||||||||||||||||||
| S Fichman G Olmos
| 4 | 6 | [10] | 1 | D Krawczyk B Mattek-Sands
| 7 | 4 | [10] | |||||||||||||||||||
| 3 | H Carter L Stefani
| 66 | 4 |  N Kichenok R Olaru
| 5 | 6 | [6] | ||||||||||||||||||||
| N Kichenok R Olaru
| 78 | 6 | N Kichenok R Olaru
| 6 | 6 | ||||||||||||||||||||||
 M Barthel A-L Friedsam
| 7 | 6 | M Barthel A-L Friedsam
| 3 | 3 | ||||||||||||||||||||||
| PR |  O Kalashnikova A Kudryavtseva
| 5 | 0 | 1 | D Krawczyk B Mattek-Sands
| 4 | 7 | [5] | |||||||||||||||||||
V Heisen Y Wang
| 77 | 78 | A Barty J Brady
| 6 | 5 | [10] | |||||||||||||||||||||
 U Eikeri E Gorgodze
| 65 | 66 | V Heisen Y Wang
| 6 | 6 | ||||||||||||||||||||||
| A Kerber A Petkovic
| 77 | 3 | [10] | A Kerber A Petkovic
| 2 | 4 | |||||||||||||||||||||
| 4 | L Kichenok J Ostapenko
| 65 | 6 | [5] | V Heisen Y Wang
| 1 | 5 | ||||||||||||||||||||
| A Barty J Brady
| 6 | 6 | A Barty J Brady
| 6 | 7 | ||||||||||||||||||||||
| K Christian S Santamaria
| 3 | 1 | A Barty J Brady
| 6 | 6 | ||||||||||||||||||||||
| WC | J Middendorf N Noha Akugue
| 65 | 4 | 2 | Y Xu S Zhang
| 4 | 3 | ||||||||||||||||||||
| 2 | Y Xu S Zhang
| 77 | 6 | ||||||||||||||||||||||||