https://www.eventimsports.de/ols/mai2015-enhttp://www.rolexgrandslam.com/Scripts/Modules/CustomView/List.aspx?idn=9677&name=NewsList&id=17692http://www.chioaachen.de/en/programm-sporthttp://www.chioaachen.de/en/programm-sport#36628http://www.chioaachen.de/en/news-page