Pellistri arrived at United from Uruguayan outfit Penarol in the summer and joined up with Alaves in January.
The 19-year-old is regarded as a top talent and managed to stand out against one of Spain's best teams on Sunday.
Atletico won the game 1-0 thanks to a Luis Suarez strike but all eyes were on Pellistri.
Facundo Pellistri vs Atletico de Madrid@FPellistri07 :cloud_tornado: pic.twitter.com/ja5gkilFjv
- MU Comps (@CompsMU) March 21, 2021
Despite Atletico's reputation for being robust at the back, it didn't faze the winger who was keen to take men on.
Pellistri always looked comfortable in possession and had no trouble with firing at goal when required.
Alaves only had 38% possession in the game so it's a testament to Pellistri's skill that he managed to stand out.
Right wing has been a problem position at United for some time and this season has seen them play Mason Greenwood and Daniel James there.
Pellistri's emergence has excited Red Devils fans and they believe he, alongside Amad Diallo, could be the future of that position.
Facundo Pellistri - the only positive of Deportivo Alaves against Atletico today.
Quick, dynamic, confident, skillful.
Manchester United loanee really showed a glimpse of his big potential. pic.twitter.com/87sxB6P1Kp
- Football Talent Scout - Jacek Kulig (@FTalentScout) March 21, 2021
If there's anything Manchester United fans can cheer about today - youngster Pellistri is having a fantastic game against Atletico.
He's incredibly fast and finds himself in good areas. Definitely promising to see this level from the teenager.
- EiF (@EiFSoccer) March 21, 2021
How have we all just glanced over the fact that Facundo Pellistri broke down the best defensive setup in Europe with ease yesterday? Such a special talent. @UtdApollo
- :flag_ye::speaking_head:️ (@FinleyPick) March 22, 2021
Many are sleeping on Pellistri
- Ché:flag_za: (@che__xo) March 22, 2021
This is every touch Facundo Pellistri had of the ball v Atletico Madrid. He looks absolutely fantastic! Hard working, fast, looked up and showed composure before crossing in the box. Considering this is against one of the top teams in Europe I'd say we may have found a gem! #MUFC https://t.co/jsZtHMbbtw
- Danni (@MUFClogical) March 21, 2021
The youngster's performance came around the same time United were in action against Leicester City in the FA Cup quarter-finals.
But Kelechi Iheanacho struck twice either side of Youri Tielemans' drive to secure a 3-1 win and a place in the semi-finals.
The Foxes will take on Southampton for a place in the final against one of Manchester City or Chelsea.
Featured Image Credit: @CompsMU/Twitter
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