RB Leipzig cruised 4-0 past second-division Hanover on Wednesday in the German Cup quarter-finals to underline they are the top favourites to win major silverware at last. Christopher Nkunku scored a first-half brace, and Konrad Laimer and Andre Silva added the other goals for the two-time runners-up. There was far more drama a little further north as SV Hamburg missed a penalty but still rallied from two goals down to tie 10-man Karlsruhe at 2-2 in stoppage time, and then prevail 3-2 in a shoot-out in which their goalkeeper Daniel Heuer Fernandes saved two spot kicks. Union Berlin beat St Pau…