Fernandes hit a cross with the outside of his boot towards Marcus Rashford at the back post in the second half of their 2-0 win.
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He then squared it across the face of goal to teammate Fred who tapped in for United, with the goal helping to send them through to the Carabao Cup final.
Fernandes' pass was superb, and the Portugal international star has credited compatriot Quaresma for teaching him the skill.
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Speaking to Sky Sports, he said: "I learnt from Quaresma, I had a great professor in Portugal so you have to learn with the players.
"You have to learn their tricks, you have to use them. As Luke [Shaw] said, one out of 20 [successful attempts] is not bad!"
Fernandes and Quaresma played four matches together for the Portuguese national side.
The latter also made a brief appearance in English football, but played just five games in his 2009 loan spell at Chelsea from Inter Milan.
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Despite this, Fernandes clearly holds him in high regard, with the now 39-year-old making 80 appearances in total for Portugal.
Speaking on United's win against Forest itself, Fernandes said: "I'm really happy for the performance of the team, for the goals that we created.
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"We had more chances, we could have scored more but I think Nottingham defended really well, it was tough to get into their defence but we did it.
"We won and we are into the final so we are really happy for that."
Anthony Martial opened the scoring against Forest before Fred's finish to secure a 5-0 aggregate win for United.
They will now face Newcastle in the Carabao Cup final at Wembley at the end of the month as they eye their first trophy since 2017.