Bruh , Even luffy and kaido fought quite a while in act 1 but it is considered one shot.
Zoro vs kamazou , they clashed sword but Still it is considered one shot.
Zoro vs monet , Monet got cut by nameless haki slash befkmore that , yet it is considered one shot.
Zoro vs hordy , zoro dodged a few water bullets but still it is considered one shot.
Clashes means nothing. It's the named attack when they are actually on offense.