| First Round |
| 12 Gilles Simon |
| Bye |
| First Round |
| 5 Damir Dzumhur |
| Bye |
| First Round |
| 3 Kyle Edmund |
| Bye |
| First Round |
| 6 Hyeon Chung |
| Bye |
| First Round |
| 15 Alex De Minaur |
| Bye |
| First Round |
| 11 Andrey Rublev |
| Bye |
| First Round |
| 13 Albert Ramos-Vinolas |
| Bye |
| First Round |
| 8 Steve Johnson |
| Bye |
| First Round |
| 9 Sam Querrey |
| Bye |
| First Round |
| 7 Filip Krajinovic |
| Bye |
| First Round |
| 4 Marco Cecchinato |
| Bye |
| First Round |
| 1 David Goffin |
| Bye |
| First Round |
| 10 Nikoloz Basilashvili |
| Bye |
| First Round |
| 14 Nicolas Jarry |
| Bye |
| First Round |
| 2 Pablo Carreno Busta |
| Bye |
| First Round |
| 16 Peter Gojowczyk |
| Bye |
| First Round | |||||
| Marcos Baghdatis | |||||
| Guillermo Garcia-Lopez | |||||
| Pre-Match | |||||
| First Round | |||||
| Mirza Basic | |||||
| Daniil Medvedev | |||||
| Pre-Match | |||||
| First Round | |||||
| Jan-Lennard Struff | |||||
| Benoit Paire | |||||
| Pre-Match | |||||
| First Round | |||||
| Ricardas Berankis | |||||
| Tennys Sandgren | |||||
| Pre-Match | |||||
| First Round | |||||
| Guido Pella | |||||
| Roberto Carballes Baena | |||||
| Pre-Match | |||||
| First Round | |||||
| Joao Sousa | |||||
| Andreas Seppi | |||||
| Pre-Match | |||||
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