Uga Okpara's 36th minute strike against JCT was enough for East Bengal to maintain their all-win record after four rounds in the I-League.
The Ghanaian central defender headed home a corner-kick from Mehtab Hossain and was adjudged Man of the Match on Friday. East Bengal now have 12 points and play Salgaocar at home on Wednesday.
East Bengal coach Trevor James Morgan said: " We are in the best of forms. We were confident of victory as we have defeated JCT earlier too. Our players performed well and that's why we are now on top."
Still seeking their first win and on one point from four games, JCT coach Parminder Singh said: "Our team is playing well and even today (Friday), our performance was good but it's just bad luck that we failed to score a goal." Parminder also alleged that Okpara handled the ball while scoring.
Mumbai: Air India and ONGC settled for a goalless draw in Kolhapur. ONGC coach Sujit Chakraborty was left ruing his team's poor conversion rate. N.D. Opara missed an easy chance in the 30th minute against his old club. Air India central defender Yusuf Ibrahim was named Man of the Match.
"They played really well in the first half. We were lucky that they missed their chances," said Yusuf Ansari, the Air India coach.
"We clearly turned the tables in the second half. But goals were hard to come by," said Ansari. "Rajat Ghosh Dsatidar (the ONGC goalkeeper) denied us a couple of times. I am looking for a better result in our next match.”