It was a battling performance by Dundee before they eventually succumbed to the onslaught from Celtic - and there was plenty to keep referee Don Robertson busy.
Brendan Rodgers' side pounded the home goal with chance after chance in the first half but had to wait until the second period before Celtic loanee Paulo Bernardo prodded the ball through the legs of goalkeeper Trevor Carson to open the scoring.
Tony Docherty's men would survive relentless pressure until Mikey Johnston came off the bench to notch a double for the visitors side as they continued their surge at the top of the Scottish Premiership table.
But things could have been different on the scoresheet had whistler Robertson stepped in – or if Greg Aitken in the VAR room had intervened on several key flashpoints throughout the 90 minutes.
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