Erling Haaland scores hat-trick on debut as Dortmund beat Augsburg 5-3 Norwegian teenager Erling Haaland scored a second-half hat trick on a dream Bundesliga debut to help Borussia Dortmund come from two goals down and win 5-3 at Augsburg on Saturday. The 19-year-old Haaland, who came on in the 56th minute after Florian Niederlechner had…