After Saturday's game, Swinney was told that x-rays on Robinson's injured ankle were negative.
"When they got with me after the game, they didn't think it was fractured. But, sometimes you can't really tell on the initial read," Swinney said. "As it turns out, he did have a little fracture in his ankle area.
"[Robinson is] going to have surgery on Tuesday. They're hopeful that he'll be back for the bowl game, but we'll see on that. I'm disappointed to lose Darius, obviously."
Robinson, who's recorded 17 tackles and an interception, has started in six of the seven games this season.
The loss makes an already thin rotation even more short on numbers.
Xavier Brewer, Bashaud Breeland and Garry Peters will be the primary cornerbacks for the rest of the season.
"The guy that we're going to really challenge is Cortez Davis, to step up," Swinney said. "Outside of that, Dante Stewart is a young man that gives us all he's got, and works hard, knows what he's doing."
There's a contingency plan in place if the position group takes another hit.
"If we had some other type of injury or something like that, we'd probably have to put [Travis] Blanks over there or take a guy like Adam Humphries and try to cross-train him, or something like that," Swinney said, "Just to give us a chance to have another guy out there.
"We're incredibly thin at corner with Darius out and Martin Jenkins out, so we'd have to kind of have an emergency plan.
"As long as those three guys and Cortez are healthy, I think we'll be in good shape."
Robinson out for the regular season
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