The Canadian international midfielder was helped off the pitch nursing an ankle injury he sustained just six minutes after coming on as a 76th minute substitute for Ianis Hagi who had scored the only goal of the game as Rangers recorded a 12th consecutive Premiership victory.
Arfield will undergo a scan to determine the full extent of the damage but must already be considered a doubt for Rangers’ trip to face St Mirren in Paisley on Wednesday and the Old Firm showdown with Celtic at Ibrox next Saturday.
“I'm worried about it because Scott doesn't come off the pitch in normal circumstances,” said Gerrard.
“He doesn't normally ask for a physio to come on, he's one who will just normally just get up and go.
“He's a brave kid, so I'm concerned about it. We'll assess it. He's got ice on the ankle area but until it actually gets scanned and assessed properly, I've got nothing more for you (on how it is) unfortunately.”
Gerrard also looks likely to again be without Ryan Jack for the forthcoming fixtures. The Scotland midfielder has now missed the last 10 games with a knee issue with plans for a return to the squad this week having been shelved.
“We are having a few issues with Ryan’s recovery and I’m frustrated with it,” said Gerrard. “We don't have a timeframe on his recovery. Unfortunately it has taken longer than we thought. We need him back as he is such an important player for us.”
Gerrard was delighted by the mentality of his players in securing another three points against an impressive Hibs side in difficult conditions at Ibrox.
“It was a good game, a tough game,” he said. “Hibs did extremely well to stay in the game. Jack Ross sets them up extremely well and they always carry a threat because they've got good players.
“But I've got even more praise for my team for getting over the line and winning it because we knew it was going to be a tough challenge with the conditions really tough. We've stood up to that and managed it extremely well."