Borussia Mönchengladbach have joined Celtic and Feyenoord in pursuing Hertha...
https://www.tumblr.com/voluntarilyfuturisticweb/823611660359090176/why-do-clubs-prefer-release-clauses-for-keepers
Borussia Mönchengladbach have joined Celtic and Feyenoord in pursuing Hertha BSC goalkeeper Tjark Ernst, according to Bild