07/31/2012 08:33 EDT | Updated 09/30/2012 05:12 EDT

Top seeds Emanuel and Alison of Brazil beat Swiss, improve to 2-0 in Olympic beach volleyball

LONDON - Defending beach volleyball world champions and top-seeded Emanuel and Alison improved to 2-0 on Tuesday with a victory over Switzerland.

The Brazilians won 21-17, 21-12 over Patrick Heuscher and Jefferson Bellaguarda 21-17, 21-12 to remain atop their pool.

In other men's play Tuesday, the Czechs beat Japan 17-21, 21-12, 15-7; Martins Plavins and Janis Smedins of Latvia beat Venezuela, 21-14, 21-16; and the Netherlands beat Germany's Jonathan Erdmann and Kay Matysik in straight sets.

Spain beat Argentina, 22-20, 21-16 on the women's side; Madelein Meppelink and Sophie van Gestel of the Netherlands beat Becchara Palmer and Louise Bawden of Australia 21-19, 21-15; and Italy beat Zara Dampney and Shauna Mullin of Britain, 21-18, 21-12.