The Spain starlet assisted Raphinha for their opening goal in their last 16 second leg clash against Benfica before scoring a delightful goal later in the first half during Barca's 3-1 triumph on Tuesday night, a result that sees them go through 4-1 on aggregate.
After Nicolas Otamendi equalised on the night, Yamal produced a moment of magic in the 27th minute to restore the lead.
He curled in a beautiful effort from just outside the area with a flicked strike that left Anatoliy Trubin helpless in the Benfica goal.
Yamal has now become the youngest player in Champions League history to both score and assist a goal in a match.
He has done so at the age of just 17 years and 241 days.
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Raphinha added his second of the night before the break to leave Barca firmly in control as they became the first side to book their place in the quarter-finals of the Champions League.
And in the quarter-final first leg, Yamal will break Julian Draxler's record for the most Champions League knockout round appearances before turning 18 with seven should he play.
Yamal's goal is his third in the Champions League this season for the Spanish giants.
He first netted in their 2-1 defeat to Monaco before finding the target against Atalanta in the league phase.
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The teenager is now on 12 goals for the campaign in all competitions, with his assist the 17th he has provided.
Yamal, who starred for Spain at Euro 2024, could be on his way to a Champions League triumph in the coming months.
This would add to the already extensive list of his accolades, including LaLiga and European Championship titles alongside the Golden Boy and Kopa Trophy.
Barcelona will face the winners of the Lille vs Borussia Dortmund tie in the quarter-finals.
The LaLiga giants, managed by Hansi Flick, haven't won the Champions League since 2015 and only reached the semi-finals once in the following years.
An appearance in the final this year could also see them face their rivals Real Madrid in an El Clasico clash.