Albert Riera has warned his Spain team-mates that 2010 FIFA World Cup South Africa™ qualifying opponents Turkey are a "very aggressive" team that "plays as one."

"Turkey is a proud team, very patriotic," he said. "They have a very aggressive game, hard... It's a team that plays as one," the midfielder said.

Valencia's Juan Mata, who replaces the injured Andres Iniesta in midfield, added that Turkey - who reached the UEFA EURO 2008 semi-finals - are Spain's toughest opponent in the group. Spain top their 2010 FIFA World Cup qualifying section with four wins from four games, and have only conceded one goal in their last 10 matches.

Turkey are second in the group, which also includes Belgium, Bosnia-Herzegovina, Estonia and Armenia.