Union Berlin went on to win the game 1-0 despite receiving a red card.
Sancho’s incredible performance coupled with Cristiano Ronaldo’s penalty took Man United to a 2-0 win.
Frankfurt also became the first German club since 1997 to win the UEFA Cup/Europa League.
Fans on social media were also left fuming and roundly slammed the invader.
The 5 ft 7-inch player had successfully pulled off this act before but failed to do it on this occasion on Thursday night in the Europa League match between Lyon and Sparta League.
After the violence took place between the two set of fans, the police and security staff had to intervene. As a result, nine men were arrested for the same.
While Villarreal topped the group stage to go ahead in the competition, Manchester United got into the tournament after getting eliminated from the group stages of UEFA Champions League.
It is further being said that up to 30 attackers may have been involved.
When Manchester United face Villarreal in the Europa League final, they look likely to do so without influential skipper Harry Maguire.
Mikel Arteta is only focused on Thursday's semi-final second leg with Villarreal as Arsenal aim to overturn a 2-1 deficit.
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