Originally Posted by newmark401
Many thanks to BobbyOne, treblings and Karoly for the additional information/corrections provided. I've changed my original post accordingly.
The winner of the women's singles event in 1925 was Erna Redlich; the runner-up at the same event in 1928 was Hilde Eisenmenger.
according to the ´Wiener Sporttagblatt´from May 21st 1928 the runner-up in the womens tournament was in fact Emmy Hagenauer, beaten by Rost 36 64 63. the result against Hilde Eisenmenger that elegos7 mentions was the semifinal that year.
using the same source, it seems that Cochet beat Matejka in 1928 with the result of 63 75 63 and in 1929 it was 64 62 46 64.