Prague, Czech Republic, May 22, 2015 - Spain's Paula Soria and Angela Lobato upset the top-ranked team on the FIVB World Tour with a two-set win over Jamie Broder and Kristina Valjas of Canada.With the Prague Open elimination victory Friday over the Canadians, who had placed on the podium at the first international Beach Volleyball events, Soria and Lobato will play Americans Brittany Hochevar and Heather McGuire Saturday. Both teams had to qualify for this week's Main Draw with preliminary round wins Wednesday.The Spain vs. USA winner advances to a quarter-final match against a team from Brazil (Carolina/Maria Clara Salgado) or the Czech Republic (Kristyna Kolocova/ Marketa Slukova) Saturday afternoon.