noun
set count tied; opponents have won an equal number of sets
Used in tennis and table tennis when both players or teams have won the same number of sets, e.g., 1-1 or 2-2. A wasei-eigo term derived from English 'set all'.
wasei-eigo (Japanese-coined English), from set all
第3セットを終えて、スコアはセットオールの1-1だ。
After the third set, the score is tied at one set all.
試合はセットオールで最終セットにもつれ込んだ。
The match went into the final set with the set count tied.