[QUOTE=elegos7;7069156]There may have been a tournament like that, but it probably was not the official Austrian Championships. I have a list of winners published in 1933 in a German book, and based on this the Austrian Championships resumed only in 1921.
As for the Berlin event, I have the following results
May 22 1921....
Here what is already published on Tennisarchives. Click on the year for the details and on the player for more of his results.
Thanks Mark, Karoly and all the others for the great work and research on the tennis history!