Hearts boss Derek McInnes branded the decision to award Celtic a controversial 99th-minute penalty as "disgusting" as the Scottish Premiership title race took another dramatic twist.
Kelechi Iheanacho scored from the spot as Celtic came from behind to win 3-2 at Fir Park.
It means Martin O'Neill's side head into the final day fixture against leaders Hearts on Saturday a point behind and knowing any victory will see them crowned champions.
Had the game at Motherwell ended in a draw, Hearts would have gone into the final weekend three points clear at the top as they look to land their first title for 66 years.
McInnes was already incensed that Hearts were denied two penalties in a 1-1 draw with Motherwell on Saturday.
And he struggled to hide his anger in his post-match news conference following his team's 3-0 win over Falkirk at Tynecastle after seeing a replay of the handball incident which led to Celtic's penalty being awarded after a VAR review.
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"I shouldn't be commenting on another game but I knew I was going to get asked the question," said McInnes.
"Having seen it, it feels like us against everybody. When you see the two we didn't get at the weekend and then you see that, how they can arrive at that situation.
"Celtic are more than a touch fortunate to get that penalty. I'm getting more and more dismayed at some of the decisions our referees are coming up with.
"It's such a bad decision. Motherwell must feel totally aggrieved. I had to keep looking at it because I thought I was missing something. When I was watching it I had to ask 'what I am looking for here?' It's actually quite disgusting."
At one point on Wednesday night -- with Motherwell beating Celtic and Hearts in front against Falkirk -- Hearts were on course to be crowned champions with a game to spare.
Iheanacho's penalty means that it's winner takes all when the top two meet in the final game of the season at Celtic Park on Saturday.
Hearts are looking to win their first Scottish title since 1960 and become the first team other than Glasgow heavyweights Celtic and Rangers to lift the trophy since 1985.
"We've got that final showdown game so it's perfect for Scottish football," said McInnes.
"The drama, the excitement, the spotlight on that, it couldn't be billed any better. We're looking forward to it. We can't wait for the game."
