Ralf Rangnick's aspect crashed out after Anthony Elanga blazed his spot-kick over the bar in a nerve-jangling shoot-out. Swedish youngster Elanga become the most effective player from either team to overlook in the shoot-out, leaving the ahead protecting his head in disbelief as Middlesbrough celebrated their stunning victory.
Jadon Sancho had positioned United ahead inside the first half, but Matt Crooks grabbed a debatable equaliser after the c programming language to set the level for Middlesbrough's memorable disillusioned. Crooks' aim turned into allowed to stand notwithstanding Duncan Watmore controlling the ball together with his hand earlier than imparting the help.
Cristiano Ronaldo had ignored a first 1/2 spot-kick for United, who've now misplaced seven in their last 8 penalty shoot-outs, which includes final season's Europa League final in opposition to Villarreal.
United are without a first-rate trophy in five years and their hopes of finishing that drought are dwindling given their Premier League struggles and a complicated Champions League ultimate sixteen tie against Atletico Madrid.
The FA Cup embarrassment is the latest hammer blow for United on the end of a painful week that saw their England forward Mason Greenwood arrested over the alleged rape and attack of a young female. While nonetheless in custody, the 20-12 months-antique turned into further arrested on Tuesday on suspicion of sexual attack and threats to kill.
England worldwide Greenwood, who turned into launched on bail on Wednesday, has been suspended from all soccer sports at United since his arrest.