Nuri Sahin and Mario Götze may have gotten the headlines, but no one was more central to Dortmund's title drive last season than Mats Hummels. He anchored the stingiest defense in the league and showed incredible poise for a 24-year-old in getting the men in yellow and black over the hump. He tells us about Dortmund's prospects this time around and discusses the upcoming Euro 2012 in Poland and Ukraine.