Milos Raonic defeated Miomir Kecmanovic 6–3, 6–4 in the first round of the ATP 250 event at 's Hertogenbosch on grass on 12 June 2023, an upset victory over the pre-match favourite. Raonic, seeded or ranked lower than Kecmanovic entering the match, controlled proceedings on the quick surface to advance without dropping a set. The Canadian's serve-based game proved effective against his Serbian opponent, who struggled to generate the rhythm needed to trouble Raonic across two straightforward sets. The result represents a significant scalp for Raonic on grass and suggests improved form heading into the latter stages of the grass-court season.