Jadon Sancho struck again to help Borussia Dortmund reach the Champions League quarter-finals but they are also sweating on his fitness ahead of crucial upcoming weeks. Dortmund will find out their opponent in the last eight of the elite event on Friday and the games are set for April 9/10 and 16/17. At the same time Dortmund in fourth face all other teams in the Bundesliga top six over the next weeks, starting with a Sunday date against number six Eintracht Frankfurt, and they can’t afford any slip-ups in their bid to breturn to the Champions League next term. Dortmund were on Thursday yet to…