Rio de Janeiro: India began their men's hockey campaign with a morale boosting 3-2 win against Ireland in their opening pool encounter here on Saturday. Rupinder Pal Singh (27th and 49th) scored a brace while V.R. Raghunath (15th minute) opened the scoring for the eight time gold medallists. John Jermyn (45th), Conor Harte (55th) reduced the margin for the Irishmen in the Pool B match. India's next match is against two-time defending champions Germany on Monday.