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?

Context paragraphs:
2017 Telekom Cup (winter): The 2017 Telekom Cup (winter) was the 8th edition of the Telekom Cup, a football friendly tournament organized by Deutsche Telekom, who is also the sponsor.  It was hosted by Fortuna Düsseldorf at the ESPRIT arena in Düsseldorf, on 14 January 2017.  Alongside the hosts, Mainz 05, Borussia Mönchengladbach, and Bayern Munich also took part.

2017–18 Borussia Mönchengladbach season: The 2017–18 Borussia Mönchengladbach season is the 118th season in the football club's history and 10th consecutive and 50th overall season in the top flight of German football, the Bundesliga, having been promoted from the 2.  Bundesliga in 2008.  In addition to the domestic league, Borussia Mönchengladbach also are participating in this season's edition of the domestic cup, the DFB-Pokal.  This is the 14th season for Mönchengladbach in the BORUSSIA-PARK, located in Mönchengladbach, North Rhine-Westphalia, Germany.  The season covers a period from 1 July 2017 to 30 June 2018.

2017 Telekom Cup (summer): The 2017 Telekom Cup (summer) was the 9th edition of the Telekom Cup, a football friendly tournament organized by Deutsche Telekom, who was also the sponsor.  It was hosted by Borussia Mönchengladbach at the BORUSSIA-PARK in Mönchengladbach, on 15 July 2017.  Alongside the hosts, Bayern Munich, 1899 Hoffenheim, and Werder Bremen also took part.

2016 Uhrencup: The 2016 Uhrencup was a summer football friendly tournament.  Matches were played in Grenchen and Biel.  Swiss clubs Young Boys (Super League) and Zürich (Challenge League) were joined by Borussia Mönchengladbach (Germany) and Galatasaray (Turkey).  It was the 52nd edition of the Uhrencup, but the first since 2013.

1973 UEFA Cup Final: The 1973 UEFA Cup Final was an association football match played over two-legs between Liverpool of England and Borussia Mönchengladbach of West Germany.  The first leg was played at Anfield, Liverpool on 10 May 1973 and the second leg was played on 23 May 1973 at the Bökelbergstadion, Mönchengladbach.  It was the final of the 1972–73 season of Europe's secondary cup competition, the UEFA Cup.  Liverpool and Mönchengladbach were both appearing in their first final, although Liverpool had previously reached the final of the European Cup Winners' Cup losing 2–1 to Borussia Dortmund.

Allan Simonsen: Allan Rodenkam Simonsen (born 15 December 1952) is a former Danish footballer and manager.  He most prominently played as a forward for German Bundesliga club Borussia Mönchengladbach, winning the 1975 and 1979 UEFA Cups, as well as for Barcelona from Spain, winning the 1982 Cup Winners' Cup.  Simonsen is the only footballer to have scored in the European Cup, UEFA Cup, and Cup Winners' Cup finals.  Simonsen was named 1977 European Footballer of the Year.

Borussia-Park: Borussia-Park (] ; stylised as BORUSSIA-PARK) is a football stadium in Mönchengladbach, North Rhine-Westphalia, Germany which serves as the home stadium of Bundesliga club Borussia Mönchengladbach.  It replaced the smaller Bökelberg stadium, which no longer satisfied modern safety standards and international requirements, in July 2004.

2016 Osnabrück Football Summer: The 2016 Osnabrück Football Summer was a summer football friendly tournament organized by VfL Osnabrück and Match IQ.  All matches were played at hosts Osnabrück's Osnatel-Arena, they were joined by Borussia Mönchengladbach (Germany), Cardiff City (England) and FC St. Pauli (Germany).

Borussia Mönchengladbach: Borussia VfL 1900 Mönchengladbach e.V., commonly known as Borussia Mönchengladbach (] ), Mönchengladbach or Gladbach, is a German football club in Mönchengladbach, North Rhine-Westphalia.  Founded in 1900, Borussia Mönchengladbach play in the Bundesliga, the top tier of the German football league system, making their first appearance in the league during the 1965–66 season.  Subsequently, the club became one of Germany's best-known, best-supported, and most successful teams, winning the Bundesliga five times during the 1970s.

Borussia Mönchengladbach II: Borussia Mönchengladbach II is a German association football club from the town of Mönchengladbach, North Rhine Westphalia.  It is the reserve team of Borussia Mönchengladbach.

Supporting paragraphs: 2017 Telekom Cup (summer) Borussia-Park
Answer: Borussia-Park