By FOX Sports staff
With just one point from their opening three games, the Red Giants entered the clash at the Shah Alam Stadium aware that anything less than a win would almost certainly condemn them to a group-stage exit.
However, they got off to a dream start nine minutes in when Michal Kubala netted with a terrific freekick, before Francis Forkey Doe doubled their lead in the 63rd minute with a clinical left-footed finish, after Amri Yahyah had charged down the middle and slipped a neat pass to him.
Amri got in on the act nine minutes later when he received the ball from Shukor Jusoh on the edge of the area and sent a delightful chip into the back of the net, and although Saigon did pull one back in the 81st minute through Moses Oloya's close-range strike, it proved to be a mere consolation.
East Bengal remain on course to finish top of the group after recording a 2-1 win over Tampines Rovers, who will now need a miracle if they are to progress to the next stage.
Chidi Edeh opened the scoring at the Salt Lake Stadium in the 23rd minute with a stunning strike, but the Stags pulled level nine minutes after the hour mark when left-back Shaiful Esah blasted a freekick home.
But three minutes from time, Lalrindika Ralte scored what proved to be the winner to leave Tampines bottom of the group with just one point from four games.
Over in Group F, Indonesian side Persibo Bojonegoro were trailing Hong Kong's Sunray Cave JC Sun Hei 8-0 at the Mong Kok Stadium when the match was abandoned in the 65th minute after injuries left the visitors with only six players on the field, which was not permitted under AFC rules.
In what turned out to be quite a curious encounter, a brace by Mamadou Barry and strikes from Liang Zicheng and Roberto Junior had Sun Hei up by four goals after just 16 minutes.
Leung Tsz Chu then netted twice in six minutes shortly after the half-hour mark, before Barry completed his hat-trick in the 39th minute to leave Persibo trailing by seven goals at halftime.
Liang made it 8-0 three minutes after the restart, before the game was called off five minutes after the hour mark.
Maldives' New Radiant moved top of the group after beating previous leaders Yangon United 3-1 at the Galolhu National Stadium.
The hosts went ahead on the half-hour mark when Ali Umar broke the offside trap and raced through, before blasting the ball into the top corner.
Seven minutes later, an over-the-top ball into the box found Ali Fasir, who doubled New Radiant's advantage with an equally-emphatic finish, before Sylla Mansa made it 3-0 with a simple header from eight yards on the stroke of halftime.
With the three points already in the bag, New Radiant took their foot off the pedal slightly in the second half but were never in danger of letting their lead slip away, although Yangon did pull one back a minute from time when Ivorian striker Adama Kone scored with a ferocious 20-yard strike.
Al Qadsia fought back after going a goal down early on to beat Group D opponents Ravshan Kulob 3-1 at the 20 Years of Independence Stadium.
The hosts broke the deadlock after just two minutes when Solomon Takyi found the back of the net, but that was cancelled out in the 20th minute by a Fahad Al Ansari effort.
Bader Al Mutawa then put the visitors in the lead in the 44th minute, before making sure of the three points two minutes before the hour mark when he grabbed his second of the game.
Al Shorta joined them on nine points but are second on head-to-head record after recording a gritty 2-1 win at ten-man Al Ramtha.
The visitors' hopes of picking up maximum points were given a boost in the first half when Mohamed Al Waked fired them ahead in the 28th minute, before Al Ramtha were reduced to ten men six minutes after when Ali Khwaileh was sent off.
But despite the numerical deficit, the hosts equalised four minutes before the break through a Mohammad Kassas penalty, although Al Shorta eventually made their advantage count when Ahmad Al Salih netted a 56th-minute winner.
Finally in Group B, Iraqi side Arbil maintained their 100% record with a crushing 4-0 win away at Fanja, although such an emphatic victory did not look on the cards at halftime as they lead by a single goal thanks to Halgurd Mulla Mohammed's 44th-minute opener.
Nonetheless, Bosnian centre-back Aleksandar Kosoric doubled their advantage nine minutes after the break, and after the hosts had Ely Cisse sent off in the 80th minute, Arbil went on to cap off an excellent day at the office with a late brace from Amjad Radhi.
Al Ansar were also convincing victors as they saw off Al Ahli Taizz 5-1 at the Camille Chamoun Sports City Stadium and there was never really any doubt what the result would be after they raced to a 3-0 lead inside the opening half-hour through goals from Ahmad Khodor, Mahmoud Kojok and Mootaz Jounaidi.
Brazilian defender Sebastiao then added a fourth from the spot in the 38th minute, and although the visitors did pull one back on the stroke of halftime through Gehad Ahmed, it was Al Ansar who had the last say as they made it 5-1 12 minutes from time through a strike from Ghanaian forward Wisdom Agblexo.
while there was also a big victory for Al Ansar as they saw off Al Ahli Taizz 5-1 at the Camille Chamoun Sports City Stadium.
Tuesday's AFC Cup Results
Al Ansar 5-1 Al Ahli Taizz
Fanja 0-4 Arbil
Ravshan Kulob 1-3 Al Qadsia
Al Ramtha 1-2 Al Shorta
New Radiant 3-1 Yangon United
Sunray Cave JC Sun Hei 8-0 Persibo Bojonegoro (match abandoned)
East Bengal 2-1 Tampines Rovers
Selangor 3-1 Saigon Xuan Thanh