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Carlo Ancelotti believes Virgil van Dijk should have been sent off for his challenge on Dries Mertens.

The Dutchman was shown a yellow card early in the first half of Liverpool's 1-0 win over Napoli after a hefty challenge on the Belgian which took both man and ball.

Slovenian referee Damir Skomina drew ire from Anfield for the decision, which left Mertens needing treatment on the pitch before re-emerging from the sidelines soon after.

But Napoli boss Ancelotti admitted he disagreed with the official's assessment, and felt van Dijk was lucky to stay on the pitch.

"I saw the video, it was a red card," he said. There are a lot of questions about VAR.

"When VAR comes in the Champions League, it will be great."

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The centre-back's booking means he will now be suspended for Liverpool's next Champions League game, with the competition resuming in February.