Saudi Arabia advanced to the knockout stage of the Asian Cup with a game to spare after beating nine-man Kyrgyzstan 2-0 on Sunday.

Goals in each half from Mohamed Kanno and Faisal Al-Ghamdi at the Ahmad bin Ali Stadium in Al-Rayyan, Qatar, put the three-time champions in first place in Group F.

The Saudis have six points from two games and are two points ahead of Thailand, who earlier drew 0-0 with Oman. Third-place Oman have one point and Kyrgyzstan are pointless.

The task for Saudi Arabia was made much easier by Kyrgyzstan, who were making only their second appearance in the tournament, having a player sent off early in each half.

First to go was Aizar Akmatov for a rash challenge on Sami Al-Naji after just eight minutes.

Kanno broke the deadlock 10 minutes before the break, volleying home Saud Abdulhamid's cross at the far post.

Seven minutes into the second half, Kimi Merk was also shown a red for a dangerous tackle.

It resulted in almost constant pressure from Saudi Arabia and, with six minutes remaining, Al-Ghamdi’s long-range shot took a deflection and went through the hands of the otherwise impressive Erzhan Tokotaev in goal.

"It is difficult to play against Saudi Arabia with 11 players but with nine it is too difficult," Tajikistan captain Tamirlan Kozubaev said. "We did our best."

Earlier, Thailand moved closer to securing a spot in the knockout stage of the Asian Cup after drawing 0-0 with Oman on Sunday.

There was little attacking action of note at the Abdullah bin Khalifa Stadium in Doha with a close-range header from Elias Dolah of Thailand in the 15th minute almost crossing the line before it was cleared.

Oman, who lost their opening game against Saudi Arabia, struggled to break through the committed Thailand defence. Issam Al-Sabhi came closest with a shot that was saved late in the game.

"We are so happy to get one point and everybody worked hard for each other," Thailand defender Pansa Hemviboom said. "We communicated well as a team to get this result."

Oman, with just a point from their opening two games, need a win in their final group match against Kyrgyzstan to keep alive hopes of a place in the knockout stage.

The top two teams from each of the six groups advance, along with the four best runners-up.