BERLIN, (Pakistan Point News - APP - 10th August, 2016) - Borussia Dortmund boss Thomas Tuchel admitted there was 'room for improvement' after his team lost 1-0 to Athletic Bilbao in their German Super Cup warm-up before facing Bayern Munich. Bundesliga champions Bayern, under new head coach Carlo Ancelotti, are Dortmund's next opponents at Signal Iduna Park on Sunday for the German Super Cup in the traditional pre-season opener. But Tuchel's experimental 4-1-4-1 formation failed to break the Bilbao defence, despite fielding an attack boasting Pierre-Emerick Aubameyang, Japan's Shinji Kagawa, plus new signings, Germany forwards Mario Goetze and Andre Schuerrle.
"There is a lot of room for improvement, when we analyse the game, we'd do well not to expect too much for Sunday," admitted Tuchel after Tuesday's defeat in St Gallen, Switzerland. "We were very tired and didn't manage to put into effect the things we have planned. "I have the feeling that although we want to, we are not in a position to put in a top performance after an intense training camp. "There is no question we can do better.
" Dortmund put out a statement after the Bilbao defeat to say Germany winger Marco Reus is on course to return to training in mid-August from the groin injury which ruled him out of Euro 2016. Tuchel had said that timeframe was "impossible" and that he would be "extremely surprised" if Reus can train again in the coming weeks, but Borussia's medical staff and director of sport Michael Zorc have confirmed the winger is expected back soon. After the Super cup showdown, Dortmund play fourth division side Eintracht Trier in the first round of the German Cup on August 22. That will be their last match before the new Bundesliga starts when they host Mainz on August 27 and have qualified directly for this season's Champions League after a year's absence.