BEIJING — Americans Kerri Walsh and Misty May-Treanor wrapped up the beach volleyball round-robin with a perfect record on Thursday, beating Norway in straight sets to head into the medal round with a 3-0 record.

May-Treanor and Walsh, gold medalists in Athens, beat Nila Ann Hakedal and Ingrid Torlen 21-12, 21-15.

The other American women's team, Nicole Branagh and Elaine Youngs, was also 3-0 after completing pool play on Wednesday.

The medal round begins Friday with 16 teams.