The Reds are set to face a tough test against the Italians, who they have played in the competition in recent years.
And they could be without their key left back Roberston, who suffered a knock in their most recent Premier League clash against Newcastle.
"It is not a major thing, it was more precautionary today, but it is not 100 per cent sure [he will be available].
"We will have to test it tomorrow and then we will see."
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