Both teams were sapped by the heat. 两支球队都因炎热而实力大减。

sap sb’ s energystrength (=make someone feel tired and weak) The whole incident seems to have sapped Mum’ s strength. 消耗某人的精力

sap sb’ s will (=make someone less certain about what they want to do) Sanctions have sapped the government’ s will. 消磨某人的意志