Early in 1989, Muster became the first Austrian to reach the semi finals of the Australian Open and, shortly after that, the first Austrian to be ranked in the world's top 10.
Early in 1989, Muster became the first Austrian to reach the semi finals of the Australian Open, losing in 4 sets to eventual champion, Ivan Lendl. Shortly after that, Muster became the first Austrian to be ranked in the world's top 10.