square up

As the boys crossed paths in the narrow gap between desks, they "squared up".

He added that the two boys had "squared up to each other" later in the morning.

India and Pakistan have been squaring up to each other too, and China is jostling for dominance.

I was just fascinated by that and had a lot of fun in Season 1 trying to square up to Stellan Skarsgård and tell him what to do.

Granted, Sasaki’s lack of command has factored into such struggles, leaving him all too often in unfavorable hitter’s counts where opponents are better primed to square up mistakes.