| 2018 MercedesCup | ||||
|---|---|---|---|---|
| Date | 11–17 June | |||
| Edition | 41st | |||
| Category | ATP World Tour 250 series | |||
| Draw | 28S / 16D | |||
| Prize money | €656,015[1] | |||
| Surface | Grass | |||
| Location | Stuttgart, Germany | |||
| Venue | Tennis Club Weissenhof | |||
| Champions | ||||
| Singles | ||||
 Roger Federer[2] | ||||
| Doubles | ||||
 Philipp Petzschner /Tim Pütz[3] | ||||
| ||||
The2018 MercedesCup was a men'stennis tournament played on outdoorgrass courts. It was the 41st edition of theStuttgart Open, and part of theATP World Tour 250 series of the2018 ATP World Tour. It was held at theTennis Club Weissenhof inStuttgart, Germany, from 11 June until 17 June 2018. First-seededRoger Federer regained the ATP no. 1 singles ranking by reaching the final.
Roger Federer defeated
Milos Raonic, 6–4, 7–6(7–3)
Philipp Petzschner /Tim Pütz defeated
Robert Lindstedt /
Marcin Matkowski, 7–6(7–5), 6–3
| Country | Player | Rank1 | Seeds |
|---|---|---|---|
| SUI | Roger Federer | 2 | 1 |
 FRA | Lucas Pouille | 16 | 2 |
 CZE | Tomáš Berdych | 20 | 3 |
 AUS | Nick Kyrgios | 23 | 4 |
| GER | Philipp Kohlschreiber | 24 | 5 |
| CAN | Denis Shapovalov | 25 | 6 |
| CAN | Milos Raonic | 28 | 7 |
 ESP | Feliciano López | 33 | 8 |
The following players receivedwildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Marco Cecchinato → replaced by
Denis IstominPeter Gojowczyk → replaced by
Viktor Galović
Chung Hyeon → replaced byMaximilian MartererDavid Ferrer → replaced by
Mirza BašićGaël Monfils → replaced byFlorian Mayer| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 PAK | Aisam-ul-Haq Qureshi |  NED | Jean-Julien Rojer | 44 | 1 |
 JPN | Ben McLachlan | GER | Jan-Lennard Struff | 60 | 2 |
 BLR | Max Mirnyi |  AUT | Philipp Oswald | 83 | 3 |
 BRA | Marcelo Demoliner | ESP | Feliciano López | 86 | 4 |
The following pairs received wildcards into the doubles main draw:
