Did Bayern Munich goalie Sven Ulreich commit biggest blunder in Champions League history?

Martin Rogers | USA TODAY

Bayern Munich's Sven Ulreich committed perhaps the worst goalkeeping error in the history of the Champions League on Tuesday, gifting Real Madrid a vital goal in the semifinal second leg between the teams.

With the clash poised at 3-2 to Madrid on aggregate score, Ulreich had a mental meltdown and was guilty of an inexplicably embarrassing blunder.

The howler came just 22 seconds into the second half. Bayern midfielder Corentin Tolisso found himself in trouble on the edge of his own penalty area as Real's attackers pressed, and attempted to pass the ball back to goalkeeper Ulreich.

The pass was under-hit, yet should still have been easily negotiated by Ulreich, who has enjoyed an outstanding season for the German side. However, Ulreich started towards the ball appearing as if he was going to pick it up, before seemingly realizing that to do so would be an infraction as an illegal back pass.

What an absolute howler by Bayern's goalkeeper, Sven Ulreich to allow Benzema to score this goal. Madness!😂pic.twitter.com/H0E9bVQALL — Roro O'Monstro.™ (@Roromeo_MUFC10) May 1, 2018

Instead, he swung a leg wildly, while slipping to the turf, as the ball trickled past him and toward the empty goal. Madrid forward Karim Benzema needed no encouragement to pounce and comfortably score as Ulreich was left in disbelief.

The bizarre goal did not end Bayern's resistance, though, with the visitors scoring soon after thanks to James Rodriguez, leaving them needing just one more goal to book a place in the final.