Reigning Mutua Madrid Open champions Marcel Granollers and Horacio Zeballos may have to overcome a host of top singles stars if they are to triumph once again at the ATP Masters 1000 event in Madrid.
In the bottom half of the draw, the second seeds will face wild cards Pablo Carreno Busta and Pedro Martinez or Rohan Bopanna and Denis Shapovalov in their opening match and are on a collision course to meet Rotterdam champ Felix Auger-Aliassime and Monte Carlo semi-finalist Grigor Dimitrov in the third round.
The Canadian-Bulgarian team opens against Diego Schwartzman and Maximo Gonzalez and might have to overcome fifth seeds Juan Sebastian Cabal and Robert Farah in the second round. The Colombians begin against Raven Klaasen and Ben McLachlan.
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Rajeev Ram and Joe Salisbury arrive in Madrid high in confidence after clinching their second Masters 1000 crown as a team in Monte Carlo. The top seeds will meet Germans Kevin Krawietz and Andreas Mies or Marcelo Arevalo and Jean-Julien Rojer in their first match.
Pierre-Hugues Herbert and Nicolas Mahut are seeded to face Ram and Salisbury in the semi-finals, with the Frenchmen aiming to win their eighth Masters 1000 title together.
#NextGenATP Spaniard Carlos Alcaraz will team with countryman Marc Lopez, while World No. 5 Stefanos Tsitsipas will join forces with brother Petros Tsitsipas. Alcaraz and Lopez start against Lukasz Kubot and Edouard Roger-Vasselin, with the Greeks facing eighth seeds Jamie Murray and Michael Venus.
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Third seeds Nikola Mektic and Mate Pavic reached the final in Madrid last season. The Croatians are in the bottom half and will play Andrey Golubev and Santiago Gonzalez or Simone Bolelli and Ivan Dodig in their opening match.
Hubert Hurkacz and John Isner will also provide a threat having dropped just one set en route to the title in Miami at the start of April. The pair will take on Ariel Behar and Gonzalo Escobar in the first round.
© Diego Souto / Mutua Madrid Open