St Mirren manager Stephen Robinson believes his side's Scottish Cup fate could have changed if they had been awarded a penalty against Hearts.
The Buddies played their part in an enthralling quarter-final tie at Tynecastle but were on the wrong end of a 4-2 scoreline.
Eamonn Brophy's strike and a Connor Ronan wonder goal weren't enough as Beni Baningime, Peter Haring, Aaron McEneff and Ellis Simms goals won it for the Jambos.
With the game still in the balance, Greg Kiltie watched a St Mirren penalty appeal inside Hearts ' 18-yard box pass him by.
Robinson believes referee Bobby Madden's decision not to blow for a spot-kick was a contributing factor in the Buddies' Scottish Cup exit.
He told the BBC : "It looks like a stonewall penalty on Greg Kiltie which perhaps changes the game a bit. Their third goal comes off their lad's knee.
"It's either an unbelievable finish or a bit of luck. But the boys gave it everything for us tonight and we ran out of steam in the last 15 minutes or so.
"I thought we dominated the ball for large periods and played some very good football.
"When we got back to 2-2 through a wonder goal, we had to hold that for five or 10 minutes. You are starting to see the style of play we want to adopt."
