I haven't watched the match but I know the results as soon as I see who makes the Zverev match thread.
If it's Ertl, then Zverev won. If it's anyone else, Zverev lost.
Anywho, good win for the old man, but I'm more impressed by the good results Zverev is making on grass. It suits him more than I thought. And when he completely adjusts his game to senior tennis, he won't have a problem beating most players on grass.