Sergio Aguero Trolls Alejandro Garnacho After Classy Cristiano Ronaldo Gesture

Manchester City legend Sergio Aguero has trolled Alejandro Garnacho after the Manchester United youngster expressed his admiration for Cristiano Ronaldo.

Garnacho, 17, was named in United’s matchday squad on Saturday and was an unused substitute in the 3-2 win over Norwich at Old Trafford.

Ronaldo scored all three goals for United, completing his hat-trick with a free-kick late in the match to secure a crucial win for Ralf Rangnick’s side.

Fans spotted a touching moment between Ronaldo and Garnacho at full-time, with the Portuguese forward appearing to gift the match ball to the academy starlet.

Garnacho took to Instagram after the match to post a picture of himself and Ronaldo, alongside the caption: "Greatest of all times...", followed by goat, football, fire and love heart emojis.

Former City striker Aguero immediately responded to Garnacho’s post, commenting: "Because you still didn't play with the best pa @leomessi.”

A former Spain youth international, Garnacho was named in Argentina’s senior squad last month alongside Ronaldo’s great rival Lionel Messi.

Garnacho was called up for the World Cup qualifiers against Venezuela and Ecuador but did not feature in either game.

United interim manager Rangnick has hailed the winger as “one of the most promising players” in the club’s academy and has vowed to hand him his first-team debut soon.

"He has been training with us the last two weeks and he is one of the most promising players," Rangnick told MUTV.

"He is only 17, but if he keeps his feet on the ground, he will not only be sitting on the bench but will be playing for this club."

However, Rangnick has admitted he is wary of throwing academy players in at the deep end this season as United chase a top four spot.

"It's always about playing the strongest available team because they are not friendly games and I don't think we would do some of the youngsters a favour if we bring them in at the wrong moment," Rangnick said.

"I love to play young players but in a moment when the team is performing well and playing with confidence.

"Then it could be the right moment to give young players game time but not in a situation like we're in right now."