Borussia Dortmund midfielder Marcel Sabitzer has said he is fit to play against Sturm Graz from his former Austrian home town in the Champions League on Tuesday. Sabitzer limped out of Dortmund’s 2-1 Bundesliga win against RB Leipzig on the weekend. But he told reporters on Monday that “I am doing much better” and that he is “confident for tomorrow.” Sabitzer, who played for Grazer AK as a boy and teenager, added: “I am from Graz, I grew up there. I have many memories. But it is our mission to win.” Sabitzer’s availability is the only good news as the injury list of coach Nuri Sahin remains lo…