By Gabriel TanFollow @@gabetan13
The result leaves the Indian side top of Group H ahead of Saigon Xuan Thanh on goal difference, and there is already a six-point gap between them and Selangor and Tampines, who have picked up just one point from the opening three games.
Having previously stated his belief that it was important to win their home games and perhaps get something on their travels, Morgan was understandably pleased after his side picked up a bonus win at the Jalan Besar Stadium on Wednesday.
"I would have been happy with a point but I'm glad we took all three," he said. "I can't say whether I was or was not expecting the result.
"It all boiled down to how Tampines approached the game; they tried to go for the win as we did.
"It was an open game, more than I would have liked, but we had good players who can hit opponents on the counter. That's why we defended deep as he had these players with a bit of pace in attack.
"We found space to exploit them in the second half and now we've got to do it again next week [in the return encounter]."
After Stags striker Sead Hadzibulic had cancelled out Anaz Hadee's own-goal to send both sides into the break level, a quick-fire double from Andrew Barisic and Chidi Edeh made it 3-1 to the Red and Gold shortly after the hour mark.
However, Khairul Amri pulled one back for Tampines a minute after Edeh's strike and the hosts went on to create a couple of good chances for an equaliser, although it was not to be as Barisic killed off their hopes of a comeback three minutes from time with his second.
Morgan admits it was a bit of a worry when the score was at 3-2, but is now hoping his side continue to work towards qualifying for the knockout round, one game at a time.
"It's definitely in the back of your mind and we know they [Tampines] have had a few comebacks before, like against Selangor [a 3-3 draw," he added.
"To go 3-1 up and then have them make it 3-2 so soon after really takes the stuffing out of you, but thankfully the fourth goal gave us a bit of insurance.
"We've made a good start but I've always said it's important to win our home games and anything we get away from home is a bonus. We have seven points now and I think a win and a draw will take us through."
The Englishman also believes his side will have a slight advantage in next Tuesday's return encounter at the Salt Lake Stadium given the match is set for an afternoon kickoff in Kolkata.
"We have two home games now [in the three remaining matches] and we want to make the most of it," Morgan explained.
"It's not easy to play in Kolkata; it gets stinking hot in the afternoon. Already, it affects my players but they've had the chance to get used to it - I think Tampines will find it difficult.
"I never set goals for my team. I like to take it one game at a time and let's see where it takes us."
East Bengal are currently second in the I-League, two points behind leaders Churchill Brothers, who are also competing in the AFC Cup in Group E.
Image courtesy of WSG