Mohammad Sahil Suhaimi scored the only goal of the game at the first minute of added time in the first half.
Singapore received a left-wing corner kick, which went into the centre of the box.
Vietnam's defender, Sam Minh Duc, became confused while trying to kickthe ball away. He then gave the ball to Suhaimi whose shot toucheddefender Pham Manh Hung and changed the direction of the ball. Goalkeeper Tran Buu Ngoc could do nothing as he watched the ball enteringthe net.
The only threatening chance to the team wasconverted to a goal. Meanwhile, Vietnam, which established theirdomination from the start of the match, failed to find Singapore's net.
Le Van Thang, Ha Minh Tuan and Vu Minh Tuanalternatively created attacks and tested keeper Izwan Mahbud's skillsduring the match's first 10 minutes and continued to make theSingaporean defenders work hard throughout the match.
Coach Hoang Van Phuc of Vietnam made all three changes in the second half, but the substitutes did not fare better.
Singapore's simple defence style worked effectively, stopping all Vietnamese attempts to score.
"The Vietnamese played better, but made serious mistakes, leading toabout eight faults, including three corner kicks near the penalty area.One of them was converted to a goal," said Nguyen Sy Hien, chairman ofthe National Coach Council, in an interview on VTV2 channel.
"With their power and domination, they should push up the team andmake rapid attacks. It would be more effective and may bring them agoal," said Hien.
It was the seventh meet between the two sides. The December 10 loss was the fourth for the Vietnamese.
Coach Phuc, however, remained easygoing during the post-match pressbriefing. "We started the match very well and in the first 25 minuteswe created a number of threatening opportunities, but failed to score agoal," he said.
"In the second quarter of the match,the midfielders did not complete their task, causing many mistakeswhich led to a goal for Singapore."
But the49-year-old coach believes Vietnam still has a chance to enter thesemi-final round, because there are two matches to be played to scorepoints, though all teams in Group A could also advance.
Meanwhile, coach Aide Iskandar of Singapore did not think his team'svictory was a matter of luck. He said there was only winning or loosingin football.
According to the former national teamplayer, Vietnam was a favourite for the title this year, but Singaporeplayed well enough to earn three points.
The victory pushes Singapore to the top place in Group A with four points. Vietnam is now in second with three points.
Vietnam will have five days to prepare for their next match againstLaos. While Singapore will play Brunei, who on December 10 lost 0-2 tothe defending champion Malaysia.-VNA