Fans burn flares and wave Vietnamese and South Korean flags on a Hanoi street. Vietnam's coach Park Hang-seo, a South Korean, is treated as a big star in Vietnam.
Four hours before the game, fans were lining up outside the My Dinh Stadium in full regalia - t-shirts, scarves and headbands.
One fan shows her love.
Another fan has stickers, headbands and horns for sale.
Flares were burned ahead of the game. The Vietnamese Football Federation has banned fans from burning flares during football matches.
One fan gets help sprucing up and checks her ticket before entering the stadium. Tickets were sold online for up to VND500,000, but scalpers were reselling them for more than 10 times the original price.
Fans carry a South Korean flag to show their love for South Korean coach Park Hang-seo.
Some try to get last-minute tickets.
Some fans got serious about blowing horns ahead of the match. The second leg begins at 7:30 p.m. Thursday night to decide which team will head into the finals against Malaysia on December 11.