The 19-year-old Philippoussis , who beat Sampras in the third round of this year 's Australian Open , stayed calm in a nervy third-set tie break against Rosset .
<response> The 19-year-old <person>Philippoussis</person> , who beat <person>Sampras</person> in the third round of this year 's <misc>Australian Open</misc> , stayed calm in a nervy third-set tie break against <person>Rosset</person> . </response>