dethrone
verb [ T ] uk/diˈθrəʊn/ us/diˈθroʊn/
废黜，推翻（国王或女王）;使下台
to remove a king or queen from their position of power
（尤指在体育比赛中）打败，击败（顶尖好手）
to beat someone who is the best at something, especially a sport, and become the best yourself
The world champion was dethroned by a young Swedish challenger. 那位世界冠军被一名年轻的瑞典挑战者击败。