Fortaleza, Brazil (SportsNetwork.com) - Costa Rica pulled off a shock result at the Estadio Castelao on Saturday, coming from behind to get a 3-1 win over Uruguay to upset the balance in Group D.
Uruguay, a strong pre-tournament favorite to advance to the knockout round, grabbed the lead after 23 minutes thanks to Edinson Cavani's penalty kick.
But the second half belonged to Los Ticos as goals from Joel Campbell, Oscar Duarte and Marco Urena turned the match in Costa Rica's favor.
The result not only sees Costa Rica climb to the top of the group, but it also helps bring the record of CONCACAF teams in the World Cup to 2-0-0 following Mexico's defeat of Cameroon on Friday.
"We are happy and I want to congratulate the team for the attitude they showed," Coasta Rica coach Jorge Luis Pinto said. "The players kept their heads after Uruguay scored. They were composed, stuck to their game and played with a lot of heart. It's an important win for us and it gives us hope, though we haven't won anything yet."
Uruguay, which did not make use of Luis Suarez due to the star striker's knee injury, looked likely to rout Costa Rica after taking the lead in the 23rd minute.
Diego Lugano attempted to get on the end of a free kick delivered into the box but was wrapped up by Junior Diaz. Referee Felix Brych pointed to the spot and Cavani converted the ensuing attempt to give Uruguay the edge.
Costa Rica nearly answered five minutes later when Joel Campbell uncorked a shot from long distance, but it sailed just inches wide of Fernando Muslera's left post.
Diego Forlan came within inches of adding to Uruguay's lead in the 44th minute when his deflected effort from the edge penalty area looked destined for the back of the net, but Keylor Navas managed to tip the shot over the crossbar.
It proved to be a pivotal save as Uruguay squandered the lead by conceding two goals in the span of three second-half minutes.
Duarte almost equalized five minutes into the second half only to see his header brushed aside by Muslera, but Campbell struck in the 54th minute by taking a square pass from the right flank and hammering a shot past the Uruguayan 'keeper.
Shortly after, Duarte made amends for his earlier miss by meeting a free kick at the back post with a diving header and sending his shot just inside Muslera's far post.
Campbell continued his virtuoso performance by setting up Costa Rica's third of the match, unlocking the Uruguayan defense with a well-weighted through ball that allowed Urena to slip a shot past the on-rushing Muslera.
Things went from bad to worse for Uruguay as Alvaro Pereira was issued a late red card for a rash challenge on Campbell, capping a miserable outing for Los Charruas.
"I don't know what Costa Rica's limit is, but today they played well," said Uruguay coach Oscar Washington Tabarez. "They were tactically better than us, which reflects well on their coach and players. When they took the lead, they gave us space and let us play where we couldn't do them any harm. Now we're going to try and get back on track against England."