Players of Iran before the match against China in FIFA 2018 World Cup Qualifier on March 28, 2017 in Tehran, Iran. [Photo/VCG]

Uzbekistan put a disappointing run of results behind them with a 1-0 win over Qatar thanks to Shanghai SIPG midfielder Odil Ahmedov's curling free kick.

Qatar, who will host the 2022 World Cup finals, are bottom of the group with four points, nine outside the automatic qualification places with three games remaining.

Japan confirmed Thailand's elimination with a 4-0 thumping at Saitama Stadium in Group B that strengthened their own qualifying hopes as they kept pace with Saudi Arabia, who defeated Iraq 1-0 thanks to a second-half goal from Yahia Al Shehri.

Japan and Saudi Arabia are three points ahead of third placed Australia, who picked up their first win in five games with a 2-0 victory over the United Arab Emirates, whose coach Mahdi Ali resigned after the game.

"Very proud of the players, it was a challenging 10 days for us," Australia coach Ange Postecoglou told Fox Sports.

"We always know at home we're a dominant team. We worked awfully hard, we pressed the way we wanted to and created opportunities. And we deserved the victory," added Postecoglou, whose side won with goals from Jackson Irvine and Mathew Leckie.

Ali stepped down after his side slipped to their second defeat in less than a week, following last Thursday's reverse against Japan.

That leaves the UAE, who had high hopes of qualifying, in fourth place in Group B, four points behind the Australians.

Saudi Arabia joined the Japanese on 16 points from seven games with a win over Iraq in Jeddah that came courtesy of Al Shehri's strike eight minutes into the second half.

A crowd of more than 60,000 watched as the Iraqis, who remain stuck on four points, saw their hopes of securing one of the automatic places at next year's finals evaporate.