Horraantii 1989, Muster waxa uu noqday Austriankii ugu horeeyay ee gaadha semi finalka Australian Open, waxa uuna ka badiyay 4 set horyaalkii ugu dambeeyay, Ivan Lendl.
Dabcan, qaab kale oo weedhan ka adag ayaa ah " Horraantii 1989, Muster wuxuu noqday Austriankii ugu horreeyay ee gaaro semi-finalka Australian Open iyo, wax yar ka dib, Austriankii ugu horreeyay ee lagu qiimeeyo 10ka ugu sareeya adduunka. "