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| 2021 MercedesCup | |
|---|---|
| Date | 8–13 June |
| Edition | 43rd |
| Category | ATP Tour 250 |
| Draw | 28S / 16D |
| Prize money | €543,210 |
| Surface | Grass |
| Location | Stuttgart, Germany |
| Venue | Tennis Club Weissenhof |
| Champions | |
| Singles | |
 Marin Čilić[1] | |
| Doubles | |
 Marcelo Demoliner / Santiago González[2] | |
The2021 MercedesCup was a men'stennis tournament played on outdoorgrass courts. It was the 43rd edition of theStuttgart Open, and part of theATP Tour 250 series of the2021 ATP Tour. It was held at theTennis Club Weissenhof inStuttgart, Germany, from 8 June until 13 June 2021. UnseededMarin Čilić won the singles title.
Marin Čilić defeated
Félix Auger-Aliassime, 7–6(7–2), 6–3Marcelo Demoliner /Santiago González defeated
Ariel Behar /
Gonzalo Escobar, 4–6, 6–3, [10–8]| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q | Q2 | Q1 |
| Singles | 250 | 150 | 90 | 45 | 20 | 0 | 12 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|
| Doubles | 0 | N/a | N/a | N/a | N/a |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q2 | Q1 |
| Singles | €53,280 | €38,200 | €27,195 | €18,130 | €11,660 | €7,010 | €3,425 | €1,780 |
| Doubles* | €19,880 | €14,240 | €9,390 | €6,090 | €3,580 | N/a | N/a | N/a |
*per team
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| CAN | Denis Shapovalov | 14 | 1 |
 POL | Hubert Hurkacz | 17 | 2 |
| CAN | Félix Auger-Aliassime | 21 | 3 |
 AUS | Alex de Minaur | 22 | 4 |
 GEO | Nikoloz Basilashvili | 30 | 5 |
 FRA | Ugo Humbert | 31 | 6 |
| FRA | Adrian Mannarino | 36 | 7 |
| AUS |
The following players receivedwildcards into the main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Alexander Bublik → replaced byAlexei Popyrin
Taylor Fritz → replaced byMarin Čilić
Cristian Garín → replaced byJordan Thompson
Aslan Karatsev → replaced byJérémy ChardyReilly Opelka → replaced by
Lloyd HarrisBenoît Paire → replaced bySam QuerreyMilos Raonic → replaced by
Márton Fucsovics
Jannik Sinner → replaced by
Dominik KoepferLorenzo Sonego → replaced by
Guido PellaJan-Lennard Struff → replaced by
Feliciano López
Stan Wawrinka → replaced by
Ilya IvashkaAlexander Zverev → replaced byGilles Simon| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 GBR | Jamie Murray | BRA | Bruno Soares | 33 | 1 |
| FRA | Jérémy Chardy | FRA | Fabrice Martin | 58 | 2 |
| RSA | Raven Klaasen |  JPN | Ben McLachlan | 67 | 3 |
 NZL | Marcus Daniell |  AUT | Philipp Oswald | 75 | 4 |
The following pairs received wildcards into the doubles main draw:
The following pairs received entry as alternates:
Félix Auger-Aliassime /Nicholas MonroeNikoloz Basilashvili /
Divij SharanAriel Behar /Gonzalo EscobarMarcelo Demoliner /Santiago GonzálezMáximo González /Andrés MolteniHubert Hurkacz /Łukasz KubotOliver Marach /
Aisam-ul-Haq Qureshi
Frederik Nielsen /
Jean-Julien RojerLuke Saville /Jordan ThompsonRohan Bopanna /Franko Škugor → replaced byOliver Marach /Aisam-ul-Haq QureshiAlexander Bublik /Reilly Opelka → replaced byAriel Behar /Gonzalo Escobar
Sander Gillé /Joran Vliegen → replaced byMáximo González /Andrés MolteniWesley Koolhof /Jean-Julien Rojer → replaced byFrederik Nielsen /Jean-Julien RojerSebastian Korda /Rajeev Ram → replaced byMarcelo Demoliner /Santiago GonzálezKevin Krawietz /John Peers → replaced byFélix Auger-Aliassime /Nicholas MonroeŁukasz Kubot /Marcelo Melo → replaced byHubert Hurkacz /Łukasz KubotAdrian Mannarino /Benoît Paire → replaced byNikoloz Basilashvili /Divij SharanTim Pütz /Michael Venus → replaced byLuke Saville /Jordan Thompson
