2014 World Cup: Best of the round of 16

Argentina vs. Switzerland: Argentina players celebrate.

Argentina vs. Switzerland: Blerim Dzemaili can't convert a chance late in extra time.

Argentina vs. Switzerland: Lionel Messi and Angel di Maria celebrate di Maria's game-winning goal in extra time.

Argentina vs. Switzerland: Switzerland players react after a missed chance in extra time.

Argentina vs. Switzerland: Goalkeeper Diego Benaglio can't stop a shot from Argentina's Angel di Maria.

Argentina vs. Switzerland: Johan Djourou heads the ball in front of Gonzalo Higuain.

Argentina vs. Switzerland: Switzerland goalkeeper Diego Benaglio makes a save.

Argentina vs. Switzerland: Lionel Messi controls the ball against Valon Behrami.

Argentina vs. Switzerland: Gelson Fernandes and Marcos Rojo vie for the ball.

Argentina vs. Switzerland: Switzerland goalkeeper Diego Benaglio makes a save.

Argentina vs. Switzerland: Ricardo Rodriguez tries to control the ball in the first half.

Argentina vs. Argentina: Lionel Messi reacts after a missed chance.

Argentina vs. Switzerland: Granit Xhaka, right, fouls Argentina's Ezequiel Lavezzi.

Argentina vs. Switzerland: Angel Di Maria (L) vies for the ball with Switzerland's Admir Mehmedi.

Argentina vs. Switzerland: Argentina forward Ezequiel Lavezzi falls next to Switzerland's Xherdan Shaqiri.

Argentina vs. Switzerland: Argentina's Ezequiel Lavezzi is tackled by Switzerland's Xherdan Shaqiri.

Argentina vs. Switzerland: Switzerland's Ricardo Rodriguez, right, clears the ball from Argentina's Lionel Messi.

Germany vs. Algeria: Andre Schurrle celebrates his goal with Jerome Boateng.

Germany vs. Algeria: Andre Schurrle celebrates his goal in extra time.

Germany vs. Algeria: Germany players celebrate after Andre Schurrle's goal in extra time.

Germany vs. Algeria: Bastian Schweinsteiger goes for a header on goal.

Germany vs. Algeria: Manuel Neuer makes a save amid chaos in front of goal.

Germany vs. Algeria: Thomas Muller reacts to a call.

Germany vs. Algeria: Islam Slimani (left) goes up for a header against Benedikt Hoewedes.

Germany vs. Algeria: Bastian Schweinsteiger reacts.

Germany vs. Algeria: Goalkeeper Manuel Neuer slides in to make a save against Algeria's Islam Slimani.

Germany vs. Algeria: Mehdi Mostefa and Aissa Mandi (20) vie for the ball in the first half.

Germany vs. Algeria: Islam Sliman and Manuel Neuer react after an Algeria goal was disallowed in the first half.

Germany vs. Algeri: Mehdi Lacen chases the ball against Bastian Schweinsteige during the first half.

Germany vs. Algeria: Mario Gotze controls the ball in the first half.

France vs. Nigeria: French players celebrate Paul Pogba's goal.

France vs. Nigeria: Goalkeeper Hugo Lloris reacts after a France goal in the second half.

France vs. Nigeria: Joseph Yobo scores an own goal in second-half stoppage time.

France vs. Nigeria: Goalkeeper Vincent Enyeama makes a save.

France vs. Nigeria: French players celebrate Paul Pogba's goal.

France vs. Nigeria: Paul Pogba celebrates after scoring a goal in the second half.

France vs. Nigeria: Raphael Varane reacts after missing a chance.

France vs. Nigeria: Goalkeeper Hugo Lloris jumps to save a shot during the first half.

France vs. Nigeria: Mathieu Valbuena lies on the pitch.

France vs. Nigeria: Emmanuel Emenike during the first half.

France vs. Nigeria: Mathieu Debuchy (R) and Ahmed Musa vie for the ball during the first half.

France vs. Nigeria: Peter Odemwingie takes a shot during the first half.

France vs. Nigeria: Olivier Giroud controls the ball in front of Kenneth Omeruo.

Costa Rica midfielder Yeltsin Tejeda hugs Costa Rica goalkeeper Keylor Navas after they defeated Greece at Arena Pernambuco.

Costa Rica defender Michael Umana sprints out of a pack of jubilant teammates after making the winning score against Greece at Arena Pernambuco.

Costa Rica goalkeeper Keylor Navas makes the winning save during penalty kicks against Greece forward Theofanis Gekas at Arena Pernambuco.

Costa Riva vs. Greece: Sokratis Papastathopoulos celebrates after scoring in stoppage time to tie the match 1-1.

Costa Riva vs. Greece: Bryan Ruiz (10) battles for the ball with Greece defender Jose Holebas during the first half.

Costa Riva vs. Greece: Keylor Navas (1) makes a save over Greece forward Dimitris Salpigidis during the first half.

Costa Riva vs. Greece: Bryan Ruiz (10) celebrates after scoring a goal.

Costa Rica vs. Greece: Socratis Papastathopoulos and Joel Campbell battle for the ball during the first half.

Netherlands vs. Mexico: Klaas-Jan Huntelaar celebrates after scoring the game-winning goal.

Netherlands vs. Mexico: Goalkeeper Jasper Cillessen celebrates after Klaas-Jan Huntelaar scored the game-winning goal.

Netherlands vs. Mexico: Arjen Robben is fouled by Rafael Marquez, setting up the decisive penalty kick.

Netherlands vs. Mexico: Klaas-Jan Huntelaar of the Netherlands celebrates after scoring the game-winning goal.

Netherlands vs. Mexico: Goalkeeper Guillermo Ochoa makes a save on a shot by forward Klaas-Jan Huntelaar.

Netherlands vs. Mexico: Wesley Sneijder celebrates his game-tying goal late in the second half.

Netherlands vs. Mexico: Jasper Cillessen makes a save in the first half.

Netherlands vs. Mexico: Giovani dos Santos celebrates his goal in the second half.

Netherlands vs. Mexico: Mexico players celebrate Giovani dos Santos' goal.

Netherlands vs. Mexico: Coach Miguel Herrera celebrates after Giovani dos Santos scored in the second half.

Netherlands vs. Mexico: Giovani dos Santos and Bruno Martins Indi clash after a challenge in the first half.

Netherlands vs. Mexico: Paul Aguilar falls over an advertising barrier during the first half.

Netherlands vs. Mexico: Robin van Persie pulls the jersey of Mexico captain Rafael Marquez.

Netherlands vs. Mexico: Ron Vlaar vies for the ball with Hector Herrera.

Netherlands vs. Mexico: Arjen Robben is challenged by Paul Aguilar.

Colombia vs. Uruguay: Colombia celebrates James Rodriguez's second goal.

Colombia vs. Uruguay: Colombia celebrates James Rodriguez's second goal of the game.

Colombia vs. Uruguay: Jackson Martinez and Diego Godin go up for a header.

Colombia vs. Uruguay: Diego Forlan of Uruguay and Mario Yepes of Colombia protest to referee Bjorn Kuipers.

Colombia vs. Uruguay: Camilo Zuniga, left, battles for the ball with Uruguay's Egidio Arevalo Rios.

Colombia vs. Uruguay: Uruguay goalkeeper Fernando Muslera fails to save a shot by James Rodriguez.

Colombia vs. Uruguay: Edinson Cavani takes a free kick in the first half.

Colombia vs. Uruguay: Colombia's James Rodriguez celebrates after scoring in the first half.

Colombia vs. Uruguay: Colombia's James Rodriguez celebrates his goal during the first half.

Colombia vs. Uruguay: Colombia's James Rodriguez scores a long-range goal in the first half.

Brazil vs. Chile: Brazil celebrates after defeating Chile in penalty kicks.

Brazil vs. Chile: Brazil goalkeeper Julio Cesar dives as the decisive penalty kick hit the post to give Brazil the win.

Brazil vs. Chile: Brazil players celebrate after winning in penalty kicks.

Brazil vs. Chile: Marcelo celebrates after winning in penalty kicks.

Brazil vs. Chile: David Luiz hugs goalkeeper Julio Cesar after Brazil won in penalty kicks.

Brazil vs. Chile: Brazil players celebrate after winning in penalty kicks.BELO HORIZONTE, BRAZIL - JUNE 28: Brazil celebrate after defeating Chile in a penalty shootout during the 2014 FIFA World Cup Brazil round of 16 match between Brazil and Chile at Estadio Mineirao on June 28, 2014 in Belo Horizonte, Brazil. (Photo by Paul Gilham/Getty Images) ORG XMIT: 491933463 ORIG FILE ID: 451385434

Brazil vs. Chile: Goalkeeper Julio Cesar tries to get the crowd fired up in Belo Horizonte.

Brazil vs. Chile: Fred (right) battles for the ball with Marcelo Diaz.

Brazil vs: Chile: David Luiz and Alex Sanchez argue during the first half.

Brazil vs. Chile: Goalkeeper Claudio Brazil moves a save in the second half.

Brazil vs. Chile: Alexis Sanchez celebrates scoring Chile's opening goal in the first half.

Brazil vs. Chile: Neymar battles for the ball with Gary Medel.

Brazil vs. Chile: Brazil's David Luiz celebrates after Brazil's goal in the first half.

Brazil vs. Chile: Brazil players celebrate after a goal in the first half.

Brazil vs. Chile : Chile goalkeeper Claudio Bravo can't stop Brazil's opening goal i nthe first half.

Brazil vs: Chile: Arturo Vidal fights of Marcelo during the first half