Interim coach Mike Tullberg will be in charge of Borussia Dortmund in the Bundesliga match at Heidenheim on Saturday, but a decision on a new helsman is nearing, according to club officials. Managing director Lars Ricken told dpa that Tullberg will oversee the Heidenheim match, no matter the result of the Champions League clash against Shakhtar Donetsk later on Wednesday. Dortmund dismissed Nuri Sahin last week after a 2-1 defeat to Bologna, Dortmund’s fourth loss in a row since the start of the