"Alvaro Morata has made a great run, he's been found by Cesc Fabregas and he's in on goal," Jenas explained.
"Claudio Yacob is out of position so he's trying to get into position and in doing so he runs across the back of Morata and he goes down.
"Morata is asking for VAR - I don't know if he knows if there's no VAR today."
Robbie Savage, sitting next to Jenas, led the laughing as he continued to paint a picture of what was going on at Stamford Bridge.
Pundits laughed at Morata during BT Sport's broadcast (Image: BT SPORT)
Morata was the butt of the jokes at BT Studios (Image: BT SPORT)
Morata has only scored five goals this season for Chelsea in the league (Image: GETTY)
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"There's no point making the VAR sign!" he laughed. "In my opinion, Jacob has got away with another one.
"He's in on goal, it's a goal-scoring opportunity, he's got to go off surely."
In the BT Sport studio was former Premier League ref Peter Walton and he agreed with Jenas' analysis that Yacob had got away with one.