Manchester United marked the start of a new era under Eric ten Haig as they beat rivals Liverpool 2-1 at Old Trafford.
Liverpool won 5–0 at this stadium, falling short of their quadruple trophy success last season, but they were well below the losing standards this time.
Goals in the half from Jadon Sancho and Marcus Rashford gave the revived hosts an advantage that they refused to surrender even after a possible grandstand finish from Mohamed Salah's late header.
Ten Haig's decision to force his players to attend a running session the day after the loss to Brentford was questioned in some circles.
But the Dutchman's stoic approach paid off on Monday evening, as his side took on opponents who are famous for their hard-working approach under Jurgen Klopp.
By fulltime against Liverpool at Old Trafford, United had run 18.3 km over 90 minutes in west London.
And it played no small part in them, forcing a quality team to make frequent mistakes - a key aspect of winning.
Jadon Sancho scored a classy goal to set United on their way to a first win under Eric ten Haig, while Marcus Rashford punished the more sluggish Liverpool by defending with a fine finish on the counter.