BERLIN -Borussia Dortmund defender Niklas Suele will be sidelined for about two months after picking up a calf muscle injury in Sunday's pre-season friendly against Juventus, the Bundesliga club said on Monday. The 29-year-old centre-back came on for Mats Hummels after 18 minutes but was taken off at halftime in the 2-1 loss, having suffered the problem without the involvement of another player. Suele will miss this week's German Cup first-round tie at Essen and the first part of the Bundesliga