The 35th edition of the traditional Mixed Open Air (MOA) grass volleyball tournament is set to take place in Bertrange from Saturday 19 to Sunday 20 July 2025, hosted by Volley Bertrange, Luxembourg.

According to the organisers, this is one of the last volleyball tournaments in Grand Duchy to be played on grass in a modern public park.

The tournament features mixed teams of six players, with a minimum of two female players per team. A total of 48 teams will compete in groups of six across eight courts. Each team is set to play five group-stage matches on Saturday, after which they will be divided into different levels based on their performance. On Sunday, teams will play another five matches as part of the final round, culminating in the tournament final.

The Mixed Open Air tournament is held in the village park of Bertrange, with matches starting at 12:00 on Saturday and at 09:30 on Sunday.