Haaland followed up his debut hat-trick for Borussia Dortmund by scoring two more, again from the substitute’s bench, in a 5-1 demolition of Cologne in the Bundesliga on Friday.
Raphel Guerreiro and Marco Reus set Dortmund on the way with first-half goals as they cut the gap between themselves and leaders RB Leipzig to four points ahead.
Guerreiro opened the scoring in the first minute and Reus doubled their lead before the half hour.
Sancho increased the lead three minutes after the re-start and Mark Uth pulled one back with a superb volley from a tight angle, before Haaland scored a goal, turning in a rebound for in the 77th minute.
Then Haaland latched onto a through ball, raced past goalkeeper Timo Horn and turned the ball in from a narrow angle for his fifth goal in two appearances.
