
Berardi fell awkwardly during the first half of Sunday’s 3-1 win at Pride Park with the hard-man defender clearly in pain and needing to be stretchered off.
The 31-year-old then had scans on Monday which confirmed the ACL tear in his knee.
Berardi has made 25 appearances for the Whites during the present campaign, helping Leeds seal a return to the Premier League as Championship champions.
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The defender’s Whites contract ran out at the end of last month but with the season extended due to the coronavirus pandemic, the former Switzerland international signed a new deal that ran until the end of the current campaign.