| Seed | Name | Rk | ER |
| 1 | Jiri Lehecka | 33 | 36 |
| 2 | Lorenzo Sonego | 42 | 40 |
| 3 | Sebastian Ofner | 58 | 69 |
| 4 | Roberto Carballes Baena | 60 | 53 |
| 5 | Christopher O'Connell | 67 | 70 |
| 6 | Stan Wawrinka | 74 | 87 |
| 7 | Matteo Arnaldi | 75 | 78 |
| 8 | Albert Ramos-Vinolas | 79 | 72 |
| Marc-Andrea Huesler | 84 | 83 | |
| Alexei Popyrin | 91 | 92 | |
| Fabian Marozsan | 93 | 95 | |
| Dominic Thiem | 94 | 90 | |
| Marco Cecchinato | 95 | 88 | |
| Alexander Shevchenko | 96 | 97 | |
| Juan Manuel Cerundolo | 100 | 110 | |
| Marin Cilic | 102 | 100 | |
| Benjamin Bonzi | 107 | 93 | |
| Zsombor Piros | 109 | 112 | |
| Jaume Munar | 110 | 108 | |
| Taro Daniel | 112 | 105 | |
| Federico Coria | 113 | 104 | |
| (WC) Dino Prizmic | 296 | ||
| (WC) | |||
| (WC) | |||
| (Q) | |||
| (Q) | |||
| (Q) | |||
| (Q) |
The wait is over! Here is the official player acceptance list for Plava Laguna Croatia Open Umag 2023. Brace yourselves for a fantastic tournament filled with intense matches and unforgettable moments. 🔥 @plavalaguna @gradumag @croatiafulloflife @TomislavPoljak
