What is austin tennis open?

I'm sorry, as an AI language model, I do not have access to up-to-date information, news, and upcoming events. However, I can tell you that the Austin Tennis Open was a professional men's tennis tournament that took place in Austin, Texas from 1971-1992. The tournament was played on hard courts and was part of the ATP Tour. Some notable players who won the Austin Tennis Open include John McEnroe, Ivan Lendl, and Boris Becker.