Grandmaster Battle In The German Bundesliga Game Analysis

In the 13th round of the German Bundesliga, I played with the Black pieces against GM Gerald Hertneck, rated 2483. I surprised my opponent with a rare variation of the Queen's Gambit Accepted and he soon chose a move that I was not familiar with. The position stayed balanced for a long time and we ultimately entered an endgame in which I had my hopes on a potential passed pawn on the queenside. Would it be enough to