Bengaluru FC rode on Thongkhosiem Haokip's double strike to pip TC Sports Club and Roca admitted they were lucky to have emerged unscathed in what was a nervy match.
Haokip gave Bengaluru the lead in the 52nd minute before Australian defender Erik Paartulu made it 2-0 in the 69th minute.
The home team struck twice in the space of two minutes -- Anatoliy Vlasichev scoring in the 71st and Ibrahim Mahudee finding the target in the 73rd -- latching onto an error from Nishu Kumar at the National Stadium last night.
Roca also expressed unhappiness at the condition of the pitch.
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"I feel we were lucky, because the last 20 minutes were awful for us, physically. The weather and pitch conditions were not something we would have liked and they (TC Sports Club) made most of it scoring twice and could have equalised late on," he said.
"It was tough for us during the game as well because they are a team that keeps pushing you. They are aggressive and have some good quality in their side. We were aware about it, but it was very tough in the last quarter as many of the players were not in a good condition."
"We were not physically good and after the first goal, we panicked a bit, and in these moments, you generally have to work hard to do the normal things. They capitalized and scored immediately."
He said his side will have to be alert in the second leg match.
"I know it will be an advantage (scoring two away but at the same time, we must be alert in the second leg. TC Sports Club showed good character at 0-2 down to level the score. They will surely create problems for us if we are not aggressive enough at home."
Another corner in the 69th minute saw Bengaluru widening their lead with Erik Paartalu nodding home.
Bengaluru looked to be cruising but TC Sports Club refused to wilt and pulled one back through Vlasichev Anatolii in the 71st minute, with his shot flying into the top right hand corner of the net.
Two minutes later, TC Sports Club were level as striker Ibrahim Mahudhee collected a poor clearance, evaded a tackle and placed the ball into the net.
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