Guirassy scores 4 goals for Dortmund, first to do so since Haaland in 2020 - Dortmund slumps to second defeat from two Bundesliga games under new coach Niko Kovac - Dortmund suffer another league loss under Kovac - Sporting nears Champions League exit in Dortmund loss, extending a slump since Amorim left - Champions League Soccer: Livestream Sporting CP vs. Dortmund From Anywhere - Leverkusen cedes ground in Bundesliga title race, Dortmund loses again in Kovac's debut - Dortmund defeated in Kovac's first game in charge - Chelsea to battle Manchester United in race for Dortmund goalkeeper Gregor Kobel - Dortmund to hire ex-Bayern boss Kovac as coach - 4-game losing run pushes Dortmund to part ways with coach Sahin