Borussia Dortmund defeated their bitter rivals Schalke 1-0 thanks to a late Youssoufa Moukoko strike, but the match left a bitter taste as BVB star Marco Reus sustained a serious-looking ankle injury.Reus missed Germany’s 2014 World Cup triumph due to an ankle injury, and is now in danger of missing another World Cup finals after he was stretchered off in tears in the 30th minute after a clash with Schalke defender Florian Flick.Jude Bellingham went close to the opener after play resumed, but his glancing header was kept out by a fingertip save from visiting keeper Alexander Schwolow. Dortmund striker Anthony Modeste nearly scored with a header of his own in first-half injury time, but his attempt at a first home goal for Dortmund bounced just wide. Modeste was subbed out in the 64th minute for Moukoko, who immediately added speed and directness up front. Dortmund’s continued pressure on the Schalke goal finally paid off in the 79th minute, when 17-year-old Moukoko headed in a superb cross from Marius Wolf.American forward Gio Reyna – brought on for Reus in the 30th minute – almost added a second when his gliding effort hit the post two minutes later. Directly after the game, Moukoko said his side would celebrate the “beautiful, incomprehensible win.””The night will definitely be a long one tonight. I dreamed of that goal every day when I was young. I had the fantasy in my head.”The victory was Dortmund’s fourth 1-0 win in seven games this season. The results are OK – but the worry over Reus remains.BUNDESLIGA – ROUND 7FridayMainz – Hertha 1-1 (0-1)/Caci 90+4 – Tousart 30/SaturdayAugsburg – Bayern 1-0 (0-0)/Berisha 59/Bayer Leverkusen – Werder Bremen 1-0 (0-0)/Demirbay 57 – Veljkovic 82/Borussia Dortmund – Schalke 1-0 (0-0)/Mokouko 79/Stuttgart – Eintracht 1-3 (0-1)/Tomas 79 – Rode 6, Kamada 55, Jakic 88/19.30: (2.95) M’ gladbach (3.50) RB Leipzig (2.55)Sunday16:30: (2.05) Union Berlin (3.50) Wolfsburg (3.90)18:30: (3.35) Bochum (3.50) Koln (2.25)20:30: (2.30) Hoffenheim (3.50) Freiburg (3.25)***odds are subject to change***