Exeter Chiefs wait for full extent of Chrysander Botha injury
Exeter boss Rob Baxter will wait to see the extent of Chrysander Botha's broken leg and dislocated ankle before seeing if he needs to sign another full-back.
Botha was hurt in Namibia's 17-13 loss to Canada on Friday, with Exeter having only brought in cover for him, last week.
"We'll get him fully assessed and then we'll make a call," Baxter said.
"With a broken leg and dislocated ankle, even if it's not complicated, it could be a while," he told BBC Devon.
"If it's complicated and someone turns round and writes the season off for us then that's slightly different, we may have to have a look at things.
"We'll see how he is and we'll make our decision based on that."
Former Glasgow back McGuigan made his debut in the 18-6 LV= Cup win over Bath on Saturday, having joined the club from New Zealand side Bay of Plenty last Sunday.
And Baxter said he was pleased by the way the Namibian-born Scotland 'A' international slotted into what was an almost full-strength Exeter side.
"For a guy that turned up pretty much on Monday and started training, I think he's done pretty well.
"To get three days training under your belt and drop into quite a pressurised game at full-back when there's a lot of ball coming your way, when you look at what he did, I think he should be very pleased with that.
"If that's his start point for him and he's going to jump on from it, I'm going to be very pleased."