The good week in Barcelona took its toll on Diego Schwartzman. The Argentine, first seeded in Estoril, dropped out of the tournament at the last minute and allowed Juan Ignacio Londero to enter the main draw.
In this way, Denis Shapovalov starts as the maximum candidate for the title. Its premiere will be in the second round against the winner of Marcos Giron and Corentin Moutet.
The Chilean Cristian Garin, second seeded, will go in second against the Cordovan Londero or Richard Gasquet.
In some of the interesting matches that the draw gave: Anderson-Tiafoe, Verdasco-Ramos and Cecchinato-Harris.
 Shapovalov vs.  Bouquets
 Humbert vs.  Davidovich
 Cilic vs.  Nishikori
 Bublik vs.  Garin