Refereeing in Scotland hit the headlines again this past weekend after a dramatic conclusion to Celtic's match away to Ross County denied them all three points in the Highlands.

Appearing to dive, County attacker Alex Schalk conned referee Don Robertson into giving the home side a last minute penalty that was converted in a 2-2 draw.

The Celtic team, manager and supporters were incensed, feeling that it was an obvious call to get right. Brendan Rodgers called it the worst decision he's ever seen, which is certainly a bold claim and highlights how absurd he found the call.

Bizarre refereeing decisions are a part of life in football and the more level headed Celtic supporter will tell you that it's not through any bias these decisions go against them but sheer incompetency. Others would say it's evidence of bias against the Hoops in the Scottish game.

There's certainly been some crazy calls down the years and in the wake of Rodgers' comments, we wanted to take a look back at some incidents that give the Schalk dive a run for its money.

Here are four of the worst refereeing decision that went against Celtic...

Celtic vs Rangers - 12/03/2017 - Clint Hill on Leigh Griffiths

We don't have to travel back too far to find an obvious contender to the weekend's decision to award Ross County a penalty. Just last month the Bhoys were on the receiving end of this blunder in the closing stages of the recent league match between Celtic and Rangers.

The Gers had just equalised through Clint Hill and as the Hoops pushed to get themselves back in front, Leigh Griffiths tried to wriggle free of Hill himself who promptly hauled the Celtic striker to the ground. Bobby Madden said no penalty much to the ire of tens of thousands of supporters inside Celtic Park.

In season when Scottish referees are seemingly making blunders up and down the division, this one sticks out as one of the worst in a high profile match that everyone was watching.

Celtic vs Inverness CT - 19/04/2015 - Josh Meekings handball

This time two years ago you may remember that, like this season, Celtic were pushing for a domestic treble of trophies under manager Ronny Deila in his first campaign as manager. It all went wrong on one fateful day at Hampden when Celtic would surrender a lead against the un-fancied Inveress Caledonian Thistle and blow the chance of a rare treble.

At the heart of that 90 minutes was a Josh Meekings handball that failed to be spotted by any of the officials, even though there was an additional assistant referee behind the goal-line.

It was a dreadful call and one that still annoys Hoops fans to this day. If the penalty and red card had been given, the Hoops would have been 3-1 up at half-time. As it was they surrendered a lead and blew it.

Celtic vs Rangers - 24/10/2010 - Broadfoot Cons Collum

Controversial decisions seem to go hand in hand with the big derbies between Celtic and Rangers and that was no different in 2010 when Kirk Broadfoot dived under pressure from Daniel Majstorovic, conning referee Willie Collum.

What Celtic supporters found so annoying about this one was the fact the referee seemingly had his back turned to the incident and therefore can't have had an idea whether the Celtic defender had made contact with the Rangers player or not.

Collum will be in the spotlight against this Sunday when he takes charge of the semi-final at Hampden. Regarded by some as the best referee in Scotland, supporters from both teams that come Monday he hasn't had a say in the outcome of the match.

Juventus vs Celtic - 18/09/2001 - Amoruso Dives

Before Seville and all that, Martin O'Neill's Celtic had a tilt at the UEFA Champions League, playing in the group stages for the first time in the club's history in 2001. Their very first match couldn't have been much tougher, away to Juventus.

It was all going swimmingly, with the Bhoys on the verge of a famous draw until at the death, Nicola Amoruso dived, with the resulting penalty being converted.

If Celtic had won the point they would have made it through to the last 16 of the competition that year. Unfortunately they would have to wait another five years to eventually make it to the knockout stages of the competition.

The decision resulted in this famous post-match interview with Martin O'Neill which further endeared him to the Celtic support. You don't see passion like this much in football, extraordinary indeed.