He had arranged to meet her on the Oude Markt, a popular place to go out in the Flemish Brabant university city.
However, when he arrived for his date the young woman was nowhere to be seen. Instead a group of youths were waiting. They beat him and robbed him of his mobile phone and his wallet.
The young man fled the scene, raising the alarm at a nearby hotel. Police are looking at CCTV pictures from the Oude Markt and the hotel in an effort to identify the assailants.