Are Celtic beginning to learn that late goals and below-par performance levels are not sustainable for a title challenge?
Former midfielder Scott Allan believes his ex-side could be starting to face that reality after suffering a late defeat to Hibernian on Sunday.
Martin O'Neill's men found late goals to beat Dundee, Livingston and Kilmarnock in recent weeks, but their luck ran out against Hibs at the weekend.
Despite Benjamin Nygren cancelling out Felix Passlack's opener at Celtic Park, Kai Andrews went on to score a late winner after Auston Trusty had been sent off.
"What I would be worried about for Celtic is the performance levels," Allan said on the BBC’s Scottish Football Podcast.
"Yes, you can score goals in the last minute of games, but you're playing against teams sat at the bottom of the league who, when holding on to something with 10 minutes to go, naturally start to go deep.
"Celtic fans will say, 'last-minute goals, that's what champions do'. I understand that. I just think you see [on Sunday], Hibs were organised, obviously get back into shape and make it hard for Celtic.
"There were some bright bits of play for Celtic, but overall performance levels over the past four weeks for me haven't been of a side who are going to go on and win the league."
