Manchester United center half Matthijs de Ligt hailed teammate Amad on Thursday night.
The Ivory Coast international scored three goals in a 3-1 win over Southampton.
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Having trailed the Saints at home, United were staring down a fourth successive Premier League home loss before Amad struck a late triple.
"He is really important at the moment," De Ligt told MUTV.
"He has signed a new contract and he is here for a long time.
"He has a lot of confidence right now and this is something that we need, especially in the period that we are (in), because it is difficult to have a lot of confidence if, as a team, you are not winning games or are going through a rough period.
"I am really happy that a player with his quality has a lot of confidence so that he could help us today."