Bagan adopted a completely different approach from the first leg. They had 16 shots in the first half but just three on target. It took them just three minutes to sound a warning.
The central midfielder became a vital cog in Juan Ferrando's side in the second half of the last ISL season following a deadline-day switch from ATK Mohun Bagan in the January transfer window.
Behind closed doors and with a raft of health safety measures in place, Indian Super League (ISL) will kick off in Bambolin on Friday and become the country's first major tournament to be organised since the enforcement of a COVID-19 lockdown eight months ago.
The Mariners looked the better side and had the best chance of the first-half in the 40th minute but Williams' powerful left-footer rattled off the upright.
Bipin Singh's late strike helped Mumbai City FC win their maiden Indian Super League title with a 2-1 victory over ATK Mohun Bagan in the final, in Margao, on Saturday.
Images from the soccer matches played across Europe on Saturday.
As in their last match against Kerala Blasters, ATKMB struggled to get going initially, while SCEB made some fine attacking moves but lacked the finishing touches.
With their fourth win of the campaign, ATK have now 14 points from seven matches while NorthEast, who have 10 points, are at fourth spot.
A summary of sports events and persons who made news on Friday.
Two-time champions ATK made their Christmas celebrations special, pipping Bengaluru FC by a David Williams solitary strike to secure their first ever win over the defending champions in the Indian Super League, in Kolkata, on Wednesday.
ATK earn a dramatic 1-0 win over NorthEast United FC and reclaim the top spot
News of all that's transpired on and off the football field
ATK's David Williams scored the all-important goal in the 48th minute to seal the win on a day when Chennaiyin FC did everything but score.
All the results from the I-League and ISL matches played on Saturday.
A rampaging ATK claimed an unprecedented third Indian Super League title triumph with a 3-1 victory over arch-rival Chennaiyin FC in a summit showdown that was played behind closed doors in Margao on Saturday. Javier Hernandez (10th minute) and Edu Garcia (48th) put ATK in the driving seat but Nerijus Valskis (69th) reduced their advantage to set up a tense end to the contest. Hernandez scored another in injury time (90+4th) to confirm a record third title.
FC Goa returned the favour just four minutes later when Seriton Fernandes and Alberto Noguera played a quick one-two, before sending the former free on the right flank.
Carl McHugh scored ATK's 100th goal of the ISL in only the sixth minute of the game but the home side, egged on by a vociferous crowd of more than 35,000, hit back with two goals from their new signing Ogbeche to begin their campaign on a winning note.
Both sides created chances in the first half but it was SCEB who converted them and deservedly headed into the break with a two-goal cushion.
News of all that's transpired on and off the football field
Defending champions Bengaluru FC registered a narrow 1-0 win over ATK in the first leg of their Hero Indian Super League semi-final clash at the Sree Kanteerava Stadium, in Bengaluru, on Sunday.
In a first for ATK Mohun Bagan this season, two first-half goals signalled the downfall for a beleaguered Bengaluru FC
Summary of sports events and persons who made news on Sunday.
All the results from the I-League and ISL matches played on Saturday