Sampras opens the defence of his U.S. Open crown against David Rikl of the Czech Republic , while top-ranked Graf begins her title defence against Yayuk Basuki of Indonesia .
<response> <person>Sampras</person> opens the defence of his <misc>U.S. Open</misc> crown against <person>David Rikl</person> of the <location>Czech Republic</location> , while top-ranked <person>Graf</person> begins her title defence against <person>Yayuk Basuki</person> of <location>Indonesia</location> . </response>