Lisbon Lion Tommy Gemmell believes Celtic have to win every game between now and the end of the season to win the Clydesdale Bank Premier League title.
The pressure is again on Hoops' boss Tony Mowbray after his side lost the lead three times in a remarkable 4-4 draw against Aberdeen at Pittodrie on Saturday.
The initiative swung back to Rangers, who beat Hibernian 3-0 at Ibrox yesterday to restore their 10-point lead over their Old Firm rivals at the top of the table with 13 games remaining.
Gemmell who played left-back for the Celtic side which won the European Cup in 1967, said that there is now no margin for error at Parkhead.
“Celtic have put themselves in the position where they cannot drop any more points,” he said.
“Every game is vital but they are starting to run out of them.
“They have to play Rangers twice and at the same time hope to win all their other games, but that is a big ask.
“The big disappointment for Celtic fans is that they are losing too many goals that could be prevented.
“That is not a sign of a championship-winning team.
“You've got to start with keeping the back door shut, build from the middle and then pop the goals in at the other end.
“If you look at any teams in any country who are looking to win their league, their goals-against record is usually excellent.
“If you don't lose goals then it is easier to win games.
“But Celtic will know the situation they are in now,” Gemmell added.
Mowbray will be without defender Darren O'Dea for next week's game against Dundee United at Parkhead after the Irishman was sent off against the Dons for picking up two yellow cards.
With Glenn Loovens and Jos Hooiveld injured, 18-year-old Josh Thompson could be paired with 19-year-old Thomas Rogne at the heart of the defence.
The first half ended level after goals from Diomansy Kamara and Marc-Antoine Fortune had been cancelled out by Michael Paton and Darren Mackie.
The visitors went two clear with strikes from Robbie Keane and Aiden McGeady and the three points looked secure.
However, Aberdeen striker Steve MacLean reduced the deficit from the spot before grabbing a dramatic late equaliser as O'Dea was sent off in the final stages.