I put yes.
However, I wouldn't say my girls have ever gotten into too serious of a fight. I trust them completely being left along unsupervised while I am working, even with access to all their toys that they are allowed to have regularly (the only things I don't let them keep is things they are way over the top obsessed about and annoy me with, or would chew apart).
My girls do guard things with each other fairly frequently, and also play games of keep away (mostly Chloe and she will turn her head taunting Angel with what she has to try and get Angel to chase her). Most of their guarding involves both of them standing stiffly around whatever they are wanting. Either Angel will put her body on something and not let it move, or she will stand above it stiffly while Chloe will have her head under Angel's with stiffness as she reaches for the toy and takes it away.
Very rarely have they really got into it (like maybe once a year), and when they did I just have to say "Hey!" or "Knock it off" and they stop, or they resolve it on their own within a few seconds anyway. Although, I will say Chloe is meaner than Angel and has frequently chomped on Angels beard/muzzle (nothing to do any damage though). Angel never puts teeth on Chloe (but she will snap right by her and roll her/stand on top of her if Chloe hurts her), even though she would be what I would consider the "dominant" one. As in, if Angel REALLY wants something she gets it/keeps it. But most of the time she gives in and allows Chloe to take things from her.