Flop #2: Sead Kolasinac (Arsenal)

Sead Kolasinac operated in the wingback role in Unai Emery's 3-4-2-1 formation and turned out to be the poorest performer for the visitors at Old Trafford.
Though he played on for the entire 90 minutes and played out a sum total of 46 passes with close to 90% success rate - including 3 key passes and a long ball, Kolasinac was poor in his primary duties as a defender.
He made just one clean tackle, made no clearances and was dispossessed twice in his own half, and also accounted for the defensive error that eventually led to Jesse Lingard's goal.
His attack through the flanks was also laden with blunders with at least three of his passes being intercepted when there were better passing options at his disposal.
Had either Rob Holding or Aaron Ramsey not gotten injured, Kolasinac would have probably found himself subbed off in the second half.