Bruno Fernandes and Kobbie Mainoo scored spectacular goals for Manchester United, securing a 2-2 draw on Sunday, denting Liverpool's Premier League title hopes.
Liverpool led 1-0 at halftime after Luis Diaz headed in Darwin Nunez's corner kick.
However, Klopp-side was taken aback when the title race took an unexpected turn at the 50-minute mark.
Jarell Quansah's slack pass found Fernandes, who spotted Caoimhin Kelleher well off his line and lobbed the Irish goalkeeper from just inside the Liverpool half.
The visitors dominated the majority of the game.. until Mainoo happened. The 18-year-old produced the highlight of his career by curling into the top corner to put United ahead.
But it took a Mohamed Salah penalty six minutes from time to avoid their second defeat at Old Trafford in three weeks.
Liverpool failed to find a winner, giving Arsenal a nine-goal advantage in the title race due to their goal difference.
The draw leaves Liverpool trailing Premier League leaders Arsenal on goal difference and one point behind Manchester City with seven games remaining in the most competitive title race.
Arsenal now enjoy a nine-goal advantage in the title race due to their goal difference.
If the Reds fail to match United's record by winning a 20th English Premier League title in Jurgen Klopp's final season in charge, they will look back on this day and wonder how two points slipped away.