What happened: Friday's session was New England's sixth practice of camp and was scheduled for 10:15 a.m. Davis appeared to be dealing with a hamstring issue, according to Mike Reiss.

Why it matters: The Patriots are evaluating their cornerback depth while a returning starter is out. Arkin's work gives the undrafted rookie an early opportunity with the top group.

What to watch: Davis' participation and the distribution of cornerback reps bear watching. Charles Woods' workload also merits attention after he failed to finish an earlier practice in a backup role.