The Belgian Open is a men's golf tournament which has been played intermittently from 1910 to 2000. All editions since 1978 have been part of the European Tour. After not having been played since 2000, it returned in 2018 as the Belgian Knockout, hosted by PietersProductions, along with its co-founder, Belgian professional golfer Thomas Pieters. With a prize pool set at €1 million, 144 professional golfers start the competition with 36 holes of stroke play, followed by 9-hole match play for the top 64 finishers from the stroke play rounds.