The two martial-arts athletes sparred on the stage.
Tips
usage
对打 = direct one-vs-one combat or sparring. Used heavily in martial-arts and action-film contexts: 对打戏 = a fight scene. Compare with 打架 (to brawl, less structured), 比武 (to compete in martial arts), and 对决 (a decisive showdown, often metaphorical).
memory
对 = 'facing / mutual' + 打 = 'to hit'. Two people facing each other and hitting = sparring.
