Celtic have gone four consecutive league games without a win for the first time in 21 years, after a second draw in five days against Livingston last night.
Neil Lennon's men were held to a 2-2 draw to leave them 20 points behind Rangers, although they still have two games in hand.
Captain Scott Brown was ordered off for lashing out at Jaze Kabia five minutes after coming on.
Ciaron Brown headed Livingston into the lead, only for Mohamed Elyounoussi and Nir Bitton to turn the game around. But Jay Emmanuel-Thomas levelled after the break to earn the hosts a point.
It means David Martindale remains unbeaten in 10 games as manager with a League Cup semi-final against St Mirren to come on Sunday.
This was always likely to be a different affair than Saturday's 0-0 draw between the pair, with Livingston making seven changes and Celtic six.
While the hosts' motivation was keeping players fresh for the semi-final, Celtic were welcoming back those who had been forced to self-isolate following a positive Covid-19 case within the squad.
Meanwhile, Real Madrid were handed a humiliating Copa del Rey last-32 defeat by third division outfit Alcoyano - who were down to 10 men. Zinedine Zidane's side took the lead through defender Eder Militao but Jose Solbes took the tie to extra time before Juanan Casanova's winner.