Former midfielder Scott Allan thinks Celtic will be all but out of the title race if they fail to beat Dundee on Sunday.
Victory over Motherwell last month moved Celtic within two points of league leaders Hearts.
But a 2-0 defeat at Tannadice just before the international break dropped them to third place, five points off the top, and they now visit Dens Park on Sunday in a game Allan regards as must win.
Speaking on the BBC’s Scottish Football Podcast, he said: “If Celtic weren’t to win on Sunday I think they would be out of the race.
"To lose back-to-back games away in Dundee, momentum is such a big thing. I think if Dundee came out victorious in that game Celtic are all but done in the title race.
"You've got guys like Callum McGregor who'll keep chipping away, they might feel they can stay in it.
"Celtic are such a strange watch at the moment, I just don't think they've got the players to go and match other teams in the league at times.
"If they're not playing that fluent football then they don't look like they've got players who, when it gets ugly, can come away with the win.
"Yes, we've seen last-minute winners, but over the course of the season you don't get away with that time and again."
