On the same Darian Stewart hit that concussed Amari Cooper, the Raiders wide receiver suffered a sprained ankle, Adam Schefter of ESPN.com reports (on Twitter).
Cooper will now have to surmount concussion protocol and recover sufficiently from this ankle malady in order to play against the Giants on Sunday.
The Raiders beat the Broncos despite missing both of their wide receivers for much of the contest, and Oakland could face the prospect of being without Cooper and Michael Crabtree again. Crabtree could face a suspension, although nothing has been announced yet, for his actions in the fight with Aqib Talib.
Beyond Cooper and Crabtree, the Silver and Black have Cordarrelle Patterson, Seth Roberts and Johnny Holton on their roster. The Raiders did not have to deal with any in-case-of-emergency receiver situations in their 12-4 2016 season; both Cooper and Crabtree started all 16 games. Cooper has never missed a game in his three-season NFL career.