The Elephants trampled all over the Lions...
Iran will retake first place in Group E with a win at home to Jordan but Thailand’s win at the home of their rivals was an impressive and deserved one.
The two teams meet again in Bangkok on Wednesday when a similar result would put Robson and his team on the verge of qualification to the Qatar tournament.
Sutee Suksomkit was the hero for the visitors scoring twice.
The first came after 12 minutes after Singapore striker Noh Alam Shah handled in his own area and the Melbourne Victory star scored from the spot.
Fifteen minutes from time, Thersdak Chaiman doubled the visitiors’ advantage and the game was all over with eight minutes remaining as Suksomkit got his second.
Mustafic Fahrudin pulled a goal back for the hosts six minutes from time but Thailand take the three points.