Morelos was immediately sent off by referee Bobby Madden, leaving Gerrard with his head in his hands and the Gers with a mountain to climb.
The visitors were already a goal down after Odsonne Edouard’s opener at Parkhead and face an huge task to get back level.
Alfredo Morelos red card: Rangers manager Steven Gerrard did not look happy after the sending off (Image: SKY SPORTS)
Alfredo Morelos red card: The Colombian striker was given a straight red for an apparent elbow (Image: REUTERS)
Gerrard will be fuming with Morelos after his fifth red card so far this season.
The decision appeared to be triggered by the assistant referee, who had a clear view of the altercation.
Brown was spotted chuckling as Morelos was marched down the tunnel, which is sure to have riled up watching Rangers fans.
Questions will again be raised about Morelos’ temperament, with the 22-year-old leaving his team-mates a man down as they look to close the 10-point gap to the Hoops at the top of the Scottish Premiership.
Alfredo Morelos red card: Gerrard looked stony-faced as he set about changing tactics (Image: SKY SPORTS)
Former Celtic striker Andy Walker was co-commentating on the Old Firm for Sky Sports, with the pundit slamming Morelos’ actions as schoolboy.
“I’m absolutely convinced it’s the assistant referee who takes charge here and tells Bobby Madden what he has seen,” Walker said.
“Now when you look at the left with Morelos and Brown, there’s a coming together.
“He throws his left arm, his left elbow. Clearly the assistant referee saw it because you saw Bobby Madden in that shot, he couldn’t see it.
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Alfredo Morelos red card: Scott Brown was seen smiling as Morelos made his way off the pitch (Image: GETTY)
“Yet again Morelos has let his team-mates down and his manager.
“It’s astonishing. He behaves like a schoolboy, time and time again.
“I don’t know how Steven Gerrard legislates for that. It’s quite remarkable.
“He must have the shortest fuse of any Old Firm player I can remember.”