Dudu scored in the 32nd, 49th, 56th and 61st minute respectively, including season's first hat-trick with East Bengal climbed upto second position with 29 points from 16 games -- two behind NEROCA, who are still on top with 31 points from 17 games.
Minerva however are also on 29 points but have played a match less than East Bengal.
After today's victory, East Bengal have opened up the league but much of the credit would go to Gokulam FC, who defeated both NEROCA and Minerva to give Khalid Jamil's men, some much-needed breathing space. With 29 goals and a difference of 13, East Bengal also have done their chances a world of good if it comes to a photo finish.
Mahmoud Al Amna (20th minute) drew the first blood in what was a big defence let down as the Syrian was seen scoring from a third attempt in a tussle with goalkeeper Kabir T. The Chennai defence was caught napping as Al Amna's first two shots were blocked by Thaufiq but he got a third time lucky to chip it into the open net.
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Mashoor Thangalakath (59th) scored the solitary goal for Chennai City as the southern outfit coached by V Soundarajan found themselves staring at relegation.
If the first goal was not enough, Chennai City's defence once again let them down when Ravanan found his own net in an effort to clear the ball from Brandon Vanlalremdika.
It was time for Dudu to make his presence felt, beginning with the easiest of the goals when he found himself in front of an open net as he slotted it in, before giving a relaxed pose to the crowd.
It's his combination with Al Amna again that yielded a goal as Dudu finished with a flourish from his powerful right footer for his brace of the day.
Thangalakath produced the sixth goal of the match and it was some respite for Chennai as he scored from a lovely cross in by Jean-Michel Joachim.
It was time for the first hat-trick of the season, when Dudu was set up by Ansumana Kromah who combined well with Al-Amna to break the defence and nick a pass to the Nigerian to do the rest.
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