Borussia Monchengladbach have reportedly entered the race for Hertha BSC...

https://hectorsexcellentthoughtss.iamarrows.com/is-a-5m-clause-something-celtic-can-afford-easily

Borussia Monchengladbach have reportedly entered the race for Hertha BSC goalkeeper Tjark Ernst, joining Celtic and Feyenoord, according to Bild. Ernst’s contract includes a €5 million release clause, making a move feasible this window