GAZIANTEP, Turkey (AP) -- Mexico is on the brink of an early exit from the Under-20 World Cup after losing 1-0 to Paraguay on Tuesday, while newcomer El Salvador stunned Australia 2-1.
Paraguay, which drew its opening match against Mali, made the breakthrough in the 52nd minute when substitute Arnaldo Sanabria fed Derlis Gonzalez, who scored with a superb side-footed volley.
Mexico, the CONCACAF champion and one of the tournament favorites, missed several good chances -- hitting the post twice, including with a free kick from Jorge Espericueta in the final minute.
Having lost 2-1 to Greece in its previous game, Mexico finds itself at the bottom of Group D with a match against Mali remaining. Paraguay has four points, while Greece and Mali played later Tuesday.
In Group C, El Salvador improved its chances of advancing with a victory that put its first points on the board.
Australia, which had earned a deserved 1-1 draw against Colombia, started well with Joshua Brillante putting the young Socceroos ahead in the ninth minute.
But El Salvador, which lost 3-0 to Turkey in its opener, tied it just eight minutes later. Jairo Henriquez delivered a deep cross which Kevin Barahona headed back across goal and into the path of Diego Coca, who scored.
Jose Pena provided the winner in the 40th, steering home a low cross from Miguel Ochoa.
The other Group C match features home side Turkey against Colombia later Tuesday. A victory for the Turks would send them into the round of 16 alongside Spain, which qualified Monday.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.