Sao Paulo: Ten-man Belgium Thursday marched into the FIFA World Cup knockout stage topping Group H after a 1-0 victory over South Korea, their third consecutive win, and set up a round of 16 showdown with the US.

Defender Jan Vertonghen scored the only goal of the match in the 77th minute at the Arena Corinthians here. Belgium once again showed that they are capable of grinding out important results as they fought with ten men for over half the game.

Belgium, though, suffered a setback when Steven Defour was sent off for a straight red card offence in the 44th minute. The FC Porto midfielder stepped on the shin of South Korea forward Kim Shinwook following a hard tackle.

Belgium's defender Jan Vertonghen celebrates after scoring during a Group H football match between South Korea and Belgium at the Corinthians Arena in Sao Paulo during the 2014 FIFA World Cup. Pic/AFP

Belgium lead Group H with nine points and will take on the US in Salvador July 1.

Algeria finished second with four points and managed to scrape through after their 1-1 draw against Russia. They will face Germany in Porto Alegre June 30.

Russia and South Korea were third and fourth with one point each.

The contest was a fairly even affair, as Belgium once again laboured through another group match.

The South Koreans threw everything they had in a bid to try and squeeze through into the knockout stages but it just wasn’t enough.

In the 30th minute Defour had saved his team, known as "Les Diables Rouges" or “The Red Devils”, from conceding a goal as the 26-year-old denied a shot from Koo Jacheol in front of the goal-line. The goal-line technology review showed the ball did not cross the line.