Kris Boyd was left baffled by the decision to award a penalty against Celtic in their game against Hearts.

The Rangers hero defended Tomoki Iwata, who was penalised for handball late in the first half, asking: "What is he meant to do?"

The spot kick was awarded by Don Robertson after John Beaton on VAR duty advised a pitchside review. 

Alistair Johnston looked to barge into his teammate's back as they contested to clear the ball. As this happened, the ball dropped onto Iwata's arm - and it was this incident that eventually ended in a penalty for Hearts.

Jorge Grant stepped up for 12 yards to give the hosts the lead at Tynecastle, but Boyd could not believe the call from the officials.

Analysing an action-packed first half, including a missed penalty from Celtic and a red card, he said on Sky Sports:  "This is the only awful decision for me. How this is given as a penalty? Alistair Johnston barges into the back of Iwata.

"The rules are the rules, he makes himself bigger, I get it but what is he meant to do? The penalty is given but some of the decisions given in that first half are baffling."

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Earlier in the game, Yang was sent off for a high boot on Alex Cochrane. 

It appeared to be a harsh decision with his eyes only on the ball, however, the studs of his boot did connect with the Hearts defender's head.

But Neil Lennon branded it a shocking decision. He said: "This is the big moment. You can debate all you want but I cannot see that being a straight red card. He is trying to flick the ball over Cochrane's head and he has gone in to flick the ball, there is no malice.

"I know it looks really bad when it is slowed down but there is no intent. I think it's a shocking decision. It's a yellow card for me. I think it is an awful decision."