Robinson out for Portsmouth
The former Millwall defender had to go off during the second half of Saturday’s 2-0 win over Luton after suffering the injury following a brave goal-line clearance.
Manager Andy Awford said: “It was proper defending – but that’s what Robbo is all about.
“It looks like he’s fractured his cheekbone and could be out for a bit, but I thought he was fantastic before he had to come off.”
Adam Webster came on for Robinson against the Hatters and could start when Pompey host Cheltenham on Tuesday night.