Dean Ashton was left flabbergasted after referee Martin Atkinson failed to consult VAR to award Chelsea a penalty.
Tammy Abraham hit his first Premier League goals as the Blues edged a thrilling encounter at Norwich to give manager Frank Lampard his first win.
Academy product Abraham started and finished the scoring as the visitors secured a 3-2 victory in East Anglia.
Todd Cantwell and Teemu Pukki twice equalised for the hosts during a breathless 45 minutes after Mason Mount had restored Chelsea’s advantage with his second of the season.
Lampard’s men dominated after the restart, all but camped in the Norwich half without really crafting a clear-cut opening to regain the lead.
They were denied a penalty just after the hour-mark, the video assistant referee siding with Martin Atkinson after he opted not to penalise Marco Stiepermann after a coming together with Azpilicueta.
And Ashton, who spent a year at Carrow Road, believes the Spaniard was unlucky to have not been given a penalty.
“I have no idea [why VAR hasn’t been used]. That is a penalty incident,” he claimed.
“Absolutely [that is a clear and obvious error]. Azpilicueta has got there first and the defender has just kicked his shin.
“He was taking the touch and then a left foot shot, without a doubt.”
Saturday is GameDay on talkSPORT and talkSPORT 2 as we become your go to destination for all the Premier League action.
We’ll bring you LIVE commentary of Premier League games across all three time slots on Saturday – 12.30pm, 3pm and 5.30pm – delivering award-winning coverage to moreGameDay listeners than ever.