noun
final bout of the day (sumo)
In sumo, the last match on the tournament schedule, often featuring high-ranking wrestlers.
結びの一番は横綱同士の対戦だった。
The final bout of the day was a match between two yokozuna.
From 結び (むすび, 'ending') + の + 一番 (いちばん, 'first' or 'best'), referring to the concluding match of a sumo day.