Erling Haaland again showed Manchester United what they had missed out on with a brace for Borussia Dortmund in their 5-1 demolition of Cologne on Friday.
Haaland, who scored a 20-minute hat-trick after coming off the bench for his debut against Augsburg last weekend, netted two more after again coming on as a second-half substitute in Friday's Bundesliga clash.
It meant the 19-year-old made history as the first Borussia Dortmund player to score five goals in his first two games for the club - with all of them coming in his first hour of German football.
England winger Jadon Sancho, also 19, was also on target with his 11th Bundesliga goal of the season and his eighth in his last eight outings as Dortmund outclassed the hapless Billy Goats.
How United could do with Haaland's goals at the moment - especially with Marcus Rashford now sidelined for at least a couple of months having suffered a double stress fracture in his back.
Haaland had been widely tipped to join the Red Devils in the January transfer window, having previously played under United boss Ole Gunnar Solskjaer at Molde in their native Norway.
But it was Dortmund who stumped up the £18million to snap him up from Red Bell Salzburg, and the German side are reaping the rewards.
Raphel Guerreiro and Marco Reus set Dortmund on the way with first-half goals as they moved to within four points of RB Leipzig ahead of Bundeliga leaders' visit to Eintracht Frankfurt on Saturday.
Guerreiro opened the scoring in the first minute and Reus doubled their lead before the half hour, the referee awarding the goal following a VAR review after initially disallowing it for offside.
Sancho increased the lead three minutes after the restart, but Mark Uth pulled one back with a superb volley from a tight angle, before Haaland scored a poacher's goal, turning in a rebound for in the 77th minute.
Ten minutes later the Norwegian had his second when he latched onto a through-ball, raced past goalkeeper Timo Horn and turned the ball in from a narrow angle.
