Deshorn Brown (23rd) scored in his first start for the Blues before goals by Rahul Bheke (25th) and Sunil Chhetri (61st) sealed the tie in favour of the home side.
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.
Nishu Kumar's seventh minute strike turned out to be enough for the hosts to claim full points as Hyderabad failed to convert multiple chances including a penalty strike.
The Indian Super League 2016 season will kick-off in Guwahati, Assam, with an opening ceremony and the season opening match.
ATK Mohun Bagan defeated Kerala Blasters 4-2 in the opening game of the 2021-22 Indian Super League, at the Nehru stadium in Fatorda, Goa, on Friday.
Dimas Delgado found Harmanjot Khabra who routed the attack from the right and floated a perfect cross into the box. Chhetri leapt higher than Shubham Sarangi and headed home. The goal made him the first Indian player to record 50 goals contributions in the Hero ISL -- 42 goals and 8 assists.
NorthEast United FC and Jamshedpur FC played out a thrilling 3-3 draw in the Indian Super League, at the Indira Gandhi Athletic Stadium, in Guwahati, on Monday.
FC Goa became the first team to guarantee themselves a spot in the Hero Indian Super League 2019-20 semi-finals with a 4-1 win over Hyderabad FC, at the Jawaharlal Nehru Stadium in Margao, Goa, on Wednesday.
English striker Chris Dagnall scored twice as Kerala Blasters exposed NorthEast United's defensive frailties to notch up a 4-1 thumping win in their Indian Super League football match, in Guwahati, on Sunday.
Sachin Tendulkar shares experiences of his playing days with the young Kerala Blasters' players, it brings in a lot of calmness, feels former England international and head coach David James.
ATKMB dominated the early exchanges and constantly raided the opposition box. However, Odisha did well to close down the spaces and keep things tight at the back.
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.
Under the watchful eyes of assistant coach Clifford Miranda, FC Goa, which is co-owned by India cricket captain Virat Kohli, started their pre-season training with the majority of the Indian contingent.
Indian Super League side FC Goa, which was slapped a Rs 11 crore fine and their co-owners Shrinivas Dempo and Dattaraj Salgaocar banned for two and three seasons respectively, has challenged the order of the tournament's regulatory commission.
Former England and Tottenham Hotspur defender Ledley King on Tuesday said though Indian football has progressed extensively in the last few years, the country needed to spread the sport more effectively at the grassroots.
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.
This was the 2019-20 edition's first goalless draw since Match 22 between ATK FC and Odisha FC, which last registered the 0-0 scoreline way back in November 24, 2019.
Chhetri was shown the first yellow in the 22nd minute after bringing down Anirudh Thapa, something he repeated on the same player after nine minutes to be sent off.
Kerala have dropped to fifth with 23 points from 14 games.
Hyderabad FC maintained their unbeaten run in the Indian Super League
FC Goa's winless run extends to five games in the division.
Spanish midfielder Javi Hernandez scored two stunning goals as Odisha FC made a winning start to their Hero Indian Super League campaign with a 3-1 victory over Bengaluru FC, at Tilak Maidan stadium in Vasco, Goa, on Wednesday.
Krishna gave early warnings after a Kauko through ball sent him clear but the veteran Fiji striker, back in the starting XI after an injury layoff, found the post in his way.
To replace Spanish Capdevila at John Abraham-owned NorthEast United
Hyderabad settled the tie in their favour in the second half through late goals from substitute Liston Colaco (85', 90').
'I am puzzled why English coaches are not successful here. But I am determined to reverse that trend'
Here are pictures from the glamorous evening...
The two teams will go up against each other again on Wednesday for the second leg
The scoreline remained 2-2 at the end of full-time and five minutes of added time despite the best effort of both sides to find the elusive winning goal.
India football team head coach Igor Stimac, on Sunday, lashed out at the Indian Super League (ISL) organisers Football Sports Development Limited (FSDL)
Cassio Gabriel, Bipin Singh, Igor Angulo and substitute Ygor Catatau were on the scoresheet for the ISL leaders.
Former Chief Justice of Bombay High Court, Kshitij Vyas, will pronounce his verdict next week over FSDL and FC Goa's appeal against sanctions imposed on them by Indian Super League's Regulatory Commission for boycotting the prize distribution ceremony following last edition's Indian Super League final.
The Kolkata franchise have nine points from four matches to occupy the top spot, ahead of FC Goa (eight points).
An injury-time goal from Sumeet Passi helped Jamshedpur FC eke out a 1-1 draw against Hyderabad FC in the Indian Super League match at the GMC Balayogi Stadium, in Hyderabad, on Thursday.
FC Goa's slim chances of making the semis all but went up in smoke as they remained on 18 points from 17 outings.
This result meant a win for ATK Mohun Bagan against Hyderabad FC on Monday would ensure them of the League Winners Shield and a maiden AFC Champions League spot.
Though a bid cannot be expected from either of the two Kolkata giants just because the document has been taken up for consideration, this is a sign that both East Bengal and Mohun Bagan are easing their stance against the IMG-Reliance owned league.
Many Indian footballers have improved by leaps and bounds thanks to the exposure of playing in the Indian Super League in the last three seasons.
The result means Mumbai sit at the top of the pile with 16 points from eight games but have drawn after their 0-3 loss to Kerala Blasters. NorthEast United remain ninth having eight points from nine games.
'You have to have a good coach to direct you on the right path.' 'I had Arsene and Pep in my professional career, but I was lucky to have good coaches in my younger days.'