Hummels slowly fixing Dortmund defense While Dortmund’s ferocious zeal in attack, albeit without an end product, took the plaudits in a 0-0 draw against Barcelona, just as impressive was their solidity in defense. That was largely down to Mats Hummels, whose positioning and composure led the way to Dortmund keeping its second consecutive clean sheet. He was imperious in the air, quick to identify dangers and made a number of crucial challenges and blocks. After an underwhelming first few matches sliding back into BVB life, Hummels looks like he can fix Dortmund’s Achilles’ heel from last season. His partnership with Manuel Akanji is blossoming and with Axel Witsel and Thomas Delaney screening the backline from midfield, Dortmund’s defense could improve to the point where the Black and Yellows are able to become credible contenders both in Europe and back home. Bayern’s new signings starting to find their feet The German champion did its major business either early (Benjamin Pavard, Lucas Hernandez) or late (Philippe Coutinho, Ivan Perisic) this summer and, as a result, those four senior signings started together for the first time on Wednesday night. Though Coutinho’s long distance radar was a little off, he looked bright and his teammates looked…