1998 du Maurier Open – Men's Singles  The 1998 du Maurier Open – Men's Singles was the men's singles event of the one hundred and ninth edition of the Canadian Open; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top eight seeds received a bye to the second round.