DUBAI, United Arab Emirates - CONCACAF champion El Salvador surrendered an early lead for the second straight game and lost 7-3 to Spain on Tuesday, endangering its chances of reaching the quarterfinals at the Beach Soccer World Cup.

Elsewhere, Costa Rica struggled again offensively and was beaten 6-0 by Argentina to leave it in last place in its first-round group.

Agustin Ruiz twice gave El Salvador a lead, first 6:44 after the opening kickoff and again 1:43 into the second period. But Amarelle equalized two seconds after Ruiz's first goal and Javier Torres tallied a dramatic overhead kick five seconds after the second to tie the game 2-2.

Spain took its first lead on a goal by Nico but Israel Garay equalized once more before the end of the second period, this time for El Salvador. The Spanish then scored four unanswered goals, including a second by Javier Torres to secure the victory.

In the other game, Costa Rica was able to hold Argentina without a goal through the first period but then allowed two each by Federico Hilarie and Agustin Dallera to drop its second in as many days, losing both by a combined 11-1.

The results left El Salvador last in Group B with no points, five behind group leader Japan which it faces in its final match on Wednesday. Costa Rica is last in Group C behind Russia, Argentina and Italy. The Ticos will conclude their group scheduled against Italy on Wednesday.