Belgium's Pro League on Thursday cancelled the remainder of the season, which has been suspended from last month because of the coronavirus pandemic.
Fans carried rainbow flags to show their support for LGBTQ rights.
Belgium's soccer federation has started an inquiry into allegations that several players in the country's top league bet on their own matches.
The Belgian national team will not train for a second day following the Brussels bomb attacks, calling off a scheduled session on Wednesday in the wake of the deaths of at least 30 people, the country's football association said.