Celtic inched closer to a 52nd Scottish title despite being held to a draw at home by nearest challengers Rangers.
Ange Postecoglou's side stay six points clear with only three games remaining and with a near insurmountable 19-goal advantage over the Premiership holders.
Celtic overcame early Rangers pressure to take the lead through Jota's close-range finish.
With the visitors looking out on their feet, Fashion Sakala fired them level to prolong the title race.
Giovanni van Bronckhorst had gone into the game admitting that it was a must-win game for his Rangers side, who are between legs in their Europa League semi-final with RB Leipzig.
Now unbeaten in 29 league games since September, Postecoglou's side effectively only need three points from their three remaining games - at home to Heart of Midlothian and Motherwell and away to Dundee United - to officially secure Celtic's 10th title in 11 years.
Rangers had turned the tables on their Glasgow rivals to win last month's Scottish Cup semi-final to ensure there would be no domestic treble for the League Cup winners and champions elect.
Van Bronckhorst, though, faced a dilemma of whether to make wholesale changes ahead of Thursday's attempt to overcome a 1-0 deficit with Leipzig.
Bringing in Scott Arfield, Steven Davis and Sakala for Ryan Jack, Glen Kamara and Scott Wright was enough fresh legs to allow Rangers to establish an early edge.
It should have led to an opening goal when Ryan Kent stole in front of Anthony Ralston to meet a James Tavernier cross but could not find the target from 10 yards.
Celtic were looking shaken but showed Rangers how it should be done after a similar move minutes later as forward Daizen Maeda's cross into the six-yard box found Jota stealing in front of Borna Barisic at the back post to prod home.
Jota had a great chance to add to his 12th goal of the season when found free inside the penalty box by Reo Hatate's through ball, but this time the on-loan Benfica winger headed wastefully over.
With Rangers looking increasingly hesitant, the unmarked Maeda also missed a golden opportunity as he headed clear from five yards from a Jota chip.
A Sakala header struck Matt O'Riley's back in front of goal and Connor Goldson shot wastefully over as Rangers started the second half as they had the first, while Maeda again scooped over at the other end.
Just when Rangers' heavy European schedule looked to be catching up with them, Kent set up Sakala for a low drive inside goalkeeper Joe Hart's near post.
Almost immediately, a Sakala drive stung Hart's fingertips and the Zambia striker should have done better than head over from 12 yards.
A late Hart double save from Scott Arfield and Ryan Kent, then a Sakala shot against the inside of a post, denied Rangers the victory they needed to really revive the title race.
More to follow.
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Celtic
Squad number15Player nameHart
Squad number56Player nameRalston
Squad number20Player nameCarter-Vickers
Squad number4Player nameStarfelt
Squad number3Player nameTaylor
Squad number33Player nameO'Riley
Squad number42Player nameMcGregor
Squad number41Player nameHatate
Squad number17Player nameJota
Squad number8Player nameFuruhashi
Squad number38Player nameMaeda
Squad number6Player nameBitton
Squad number7Player nameGiakoumakis
Squad number11Player nameAbada
Squad number18Player nameRogic
Rangers
Squad number1Player nameMcGregor
Squad number2Player nameTavernier
Squad number6Player nameGoldson
Squad number3Player nameBassey
Squad number31Player nameBarisic
Squad number4Player nameLundstram
Squad number10Player nameDavis
Squad number30Player nameSakala
Squad number37Player nameArfield
Squad number14Player nameKent
Squad number17Player nameAyodele-Aribo
Squad number8Player nameJack
Squad number9Player nameDiallo
Squad number23Player nameWright
Line-ups
Celtic
Formation 4-3-3
15Hart
56Ralston20Carter-Vickers4Starfelt3Taylor
33O'Riley42McGregor41Hatate
17Neves Filipe8Furuhashi38Maeda
15Hart56RalstonBooked at 50mins20Carter-Vickers4Starfelt3Taylor33O'RileySubstituted forBittonat 61'minutesBooked at 72mins42McGregor41HatateSubstituted forRogicat 61'minutes17Neves Filipe8FuruhashiSubstituted forGiakoumakisat 61'minutesBooked at 77mins38MaedaSubstituted forAbadaat 78'minutesSubstitutes
6Bitton7Giakoumakis11Abada14Turnbull16McCarthy18Rogic29Bain49Forrest57WelshRangers
Formation 4-2-3-1
1McGregor
2Tavernier6Goldson3Bassey31Barisic
4Lundstram10Davis
30Sakala37Arfield14Kent
17Ayodele-Aribo
1McGregor2Tavernier6GoldsonBooked at 90mins3Bassey31BarisicBooked at 64mins4Lundstram10DavisSubstituted forJackat 63'minutes30Sakala37ArfieldSubstituted forDialloat 87'minutesBooked at 87mins14KentBooked at 77mins17Ayodele-AriboSubstituted forWrightat 63'minutesSubstitutes
8Jack9Diallo11Itten18Kamara19Sands23Wright33McLaughlin43King51LowryLive Text
Match ends, Celtic 1, Rangers 1.
Second Half ends, Celtic 1, Rangers 1.
Connor Goldson (Rangers) is shown the yellow card.
Anthony Ralston (Celtic) wins a free kick in the defensive half.
Foul by Connor Goldson (Rangers).
Foul by Tomas Rogic (Celtic).
Borna Barisic (Rangers) wins a free kick in the defensive half.
Offside, Rangers. Scott Wright tries a through ball, but Fashion Sakala is caught offside.
Offside, Celtic. Giorgos Giakoumakis tries a through ball, but Liel Abada is caught offside.
Attempt missed. James Tavernier (Rangers) header from the centre of the box misses to the right. Assisted by Borna Barisic with a cross.
Attempt missed. Jota (Celtic) right footed shot from outside the box is too high from a direct free kick.
Amad Diallo (Rangers) is shown the yellow card for a bad foul.
Liel Abada (Celtic) wins a free kick in the attacking half.
Foul by Amad Diallo (Rangers).
Substitution, Rangers. Amad Diallo replaces Scott Arfield.
Corner, Rangers. Conceded by Tomas Rogic.
Fashion Sakala (Rangers) hits the right post with a right footed shot from the centre of the box. Assisted by Scott Arfield.
Attempt saved. Ryan Jack (Rangers) right footed shot from the centre of the box is saved in the centre of the goal.
Attempt saved. Scott Arfield (Rangers) right footed shot from the centre of the box is saved in the bottom left corner. Assisted by Scott Wright.
Foul by Greg Taylor (Celtic).