Gameweek 15 of the Hero I-League saw Mohun Bagan slump to their first defeat of the season at the hands of Royal Wahingdoh. Despite the loss, the Mariners retained the top spot in the table with Wahingdoh climbing to second and Pune FC occupying the third spot. Bengaluru FC slipped down to fourth.Royal Wahingdoh beat Mohun Bagan 3-2 in an exciting match at the Jawaharlal Nehru Stadium, Shillong. Bagan’s Balwant Singh (Chennaiyin FC) opened the scoring for the visitors in the eighth minute. Jackichand Singh levelled up the scores after half time before Sony Norde put the visitors back in the lead after 80 minutes. Wahingdoh rallied and equalized again through a penalty by Densill Theobald after Balwant was shown a red card for handling the ball in the box. Thokchom ‘Naoba’ Singh (Delhi Dynamos) completed the comeback with a thunderous shot in the 90th minute.East Bengal were held to a 1-1 draw by Mumbai FC at the Salt Lake Stadium in Kolkata. Dudu Omagbemi (FC Pune City) scored the equalizer for the home team after Josimar put the away side one goal ahead in the 33rd minute.Dempo SC suffered a 1-2 home defeat at the hands of Pune FC at the Jawaharlal Nehru Stadium, Goa. Tolgay Ozbey (FC Goa) scored the Goan team’s only goal of the match after coming on as a substitute. Darko Nikac and Lalrempuia Fanai scored Pune FC’s goals.Bharat FC held Shillong Lajong to a 1-1 draw at the Shree Shiv Chhatrapati Stadium, Pune. Uilliams Souza scored the equalizer for Shillong from Penn Orji’s (Kerala Blaster FC) pin-point cross. Surajit Bose had given the home team the lead in the first half.In the Goan derby at the Jawaharlal Nehru Stadium in Goa, Sporting Clube de Goa beat Salgaocar FC 0-2 by virtue of goals from Odafa Okolie and Brandon Fernandes. Sandesh Jhingan (Kerala Blasters FC) had a brilliant game at the heart of Sporting’s defence.