相撲に勝って勝負に負ける

すもうにかってしょうぶにまけるsumounikatteshoubunimakeru

expression · ichidan verb

1. to ultimately fail despite being in a favourable position
2. to fail at the last moment
3. to win the battle but lose the war
4. to have the upper hand in sumo (technique) but lose the match

Study it in Yanamino