Kris Commons has slated Rangers boss Michael Beale's decision-making following yesterday's Scottish Cup semi-final against Celtic.

The Ibrox outfit were knocked out of the competition in their final bid for silverware this season.

Commons felt his former side Celtic did not have to get out of second gear to defeat their rivals and he also feels that substitutions played a big part in the game.

He wrote in the Daily Mail: "You are 1-0 down in a Scottish Cup semifinal with maybe 10 minutes to go. Despite seeing plenty of the ball, nothing has yet fallen for you in the penalty box but your supporters have stayed with you in the belief that the one gilt-edged chance you crave may yet come along.

"All you can do is hope that it falls to the right player. Look, by no means was Alfredo Morelos having his best game yesterday. But if Rangers were going to get a goal, he was the most likely man to get it.

"For that reason, I was rubbing my eyes in disbelief when the board went up to signal that the Colombian was being replaced by Ianis Hagi. Listen, Hagi's a talented player who's had his injury issues of late but he's not scored at all this season and hasn't hit the back of the net since January of last year. He's a creator, not a finisher.

"His introduction at that stage of the game was utterly perplexing. And, for me, it signalled the moment that Celtic secured their passage to the Scottish Cup final. You badly need a goal, so keep your most likely scorer on the pitch. It's really not rocket science.

"It's just one of many questions that Rangers fans will be asking of Michael Beale after his winless streak against Celtic extended to four matches.

"Fundamentally, though, it will be the manager's inability to get one over on Ange Postecoglou that will be foremost in their thoughts this week. Let's get this straight? Celtic were some way off the pace here. Callum McGregor didn't set the tempo the way he normally does, Kyogo Furuhashi only really sniffed out one opportunity and both Daizen Maeda and Jota have been better.

"You might say that Postecoglou's men were in third gear yet still won. Again. For all they enjoyed a lot of the ball, Rangers only forced Joe Hart into a couple of meaningful saves. They just didn't do enough to win the game."

He added: "Ryan Kent's contribution summed Beale's men up. He completely switched off to allow Maeda to cross for Jota. As an attacker, defending doesn't come naturally when you drop deep but that was schoolboy stuff. At any level of the game you are taught to play to the whistle but Kent just seemed miles away in that moment.

"This is an individual with ability - who cost Rangers £7million. But when was the last time he looked like a player in that price bracket? It was no surprise whatsoever that he failed to reappear for the second half.

"This summer, Beale needs to sign not only good footballers but ones that bring a different mentality to his side. Too many of this group are too mentally scarred by too many defeats like this. They've become too accustomed to days like yesterday when they huff and puff but again come up short.

"Despite there only being one goal in it going into the final stages, you never felt like Rangers had the belief that this would be their day. They've been in this movie far too often. What Beale wouldn't give for the kind of mentality Postecoglou (below) has instilled in his side.

"Celtic have rightly been lavished with praise for the devastating football they can play at times but yesterday demonstrated that there's an extraordinary mental toughness to them, too. Cameron Carter-Vickers and Carl Starfelt were absolutely immense. If one wasn't getting their head or their foot on a cross, the other one was. It's become quite the partnership.

"You could not speak highly enough about the contribution of all of Celtic's defenders. Greg Taylor ensured James Tavernier resorted to pitching long crosses into the box all afternoon.

"Alistair Johnston simply dominated Kent from the word go. And when the Canadian went off, Anthony Ralston just did all that was asked of him. Having lost out in extra-time to Rangers at this stage last year, even a perfectionist like Postecoglou will just be happy that his side have made it through to the final.

"Neil Lennon used to always tell us that semi-finals were the most difficult games to navigate. They are rarely ones for the purist. All that truly counts is that you get through."