The club has also ended the contract of Leekens's assistant Rudi Verkempinck. Philippe Clement, who has been training promising players will step into the breech.
Leekens's sacking comes as no surprise. There had been unhappiness with his performance among fans and club officials for some time. The Club Brugge management met in an emergency session following the team's defeat at the hands of Lierse last Wednesday.
This weekend's defeat at the hands of West Flemish rivals settled the matter. Barely six months after the manager switched from the Red Devils Club Brugge have shown him the door.
Zulte Waregem now heads the Belgian first division ahead of Anderlecht and Racing Genk. Club Brugge are eighth. More bad news for the people of Bruges at the bottom of the league: Cercle are bottom behind newcomers Waasland-Beveren.
In Sunday night's action Standard beat Oud Heverlee Leuven 1 - 0. Earlier in the evening Club Brugge lost at home to Zulte Waregem 1 - 0.