Question: The 2017 Telekom Cup (summer) was the 9th edition of the Telekom Cup, a football friendly tournament organized by Deutsche Telekom, it was hosted by Borussia Mönchengladbach at which football stadium in Mönchengladbach, North Rhine-Westphalia, Germany which serves as the home stadium of Bundesliga club Borussia Mönchengladbach?
answer: Borussia-Park