series of practice bouts with the same opponent
Sumo term: a training session where a wrestler faces the same opponent repeatedly in a row of practice matches.
The young wrestler did a series of practice bouts with his senior stablemate.
申し合い稽古 is a practice format where wrestlers rotate opponents after each bout, while 三番稽古 involves staying with the same opponent for multiple consecutive bouts.
From 三番 (three bouts) + 稽古 (practice). The term originally referred to a set of three consecutive practice bouts with the same partner, but now can refer to any repeated practice with the same opponent.