Rasmus Hojlund fired the Reds into a first-half lead at SoFi Stadium, showing brilliant pace, power and strength to muscle off Ayden Heaven before tucking the ball home after just ten minutes played.
Despite our early dominance, Arsenal hit back through Gabriel Jesus in a goal that appeared to be offside, as the Brazilian tapped home from close range to restore parity.
Gabriel Martinelli's late strike settled the game however, as he netted the winning goal with just nine minutes left on the clock in Los Angeles.
A penalty shootout then took place following the encounter, with Jadon Sancho netting the decisive spot-kick as Ten Hag's side emerged 4-3 winners.