Any tricks to slow down a partner?

[Antonio.King]

It won't really benefit you much to attempt to slow down your partner, especially if they're the R1. All you can really do is keep your own pace, so long as you're mirroring whatever signal(s) they're giving.

This is something that's more appropriate for the match de-brief between the two of you vs focusing on it during the match. If it doesn't hinder the match, save it for the debrief.