love set; 6-0 set
Tennis term for a set won without the opponent scoring a game. Used in sports commentary and casual tennis talk.
彼は第1セットをラブセットで取った。
He took the first set in a love set.
ラブセットで負けるのは悔しい。
It's frustrating to lose a set 6-0.
Variant with interpunct; less common but seen in some contexts.
Borrowed from English 'love set', where 'love' in tennis scoring likely derives from the phrase 'for love' (i.e., playing for nothing).