India beat France 3-2 in their opening match here last night, but the Asian Games champions' defence was given a harrowing time by the fast overlapping French strikers, who capitalised on counters to stun them twice.
"It's a good start for our team, winning the first match, but we need to work on our defence structure and it has to be improved," said Lakra.
Lakra said that his team will have to take its game a notch higher as far as the defence is concerned.
"Our new strategy is working in our favour, now we have to take it a notch higher in terms of defence," said Lakra.
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Meanwhile, the Indian women's team vice-captain Deepika also said that the girls will have to raise their level in the upcoming games.
"The first match was a closely-fought clash and we came close to scoring goals on a few occasions. We have learnt a few things from the match and we will use the experience in coming matches. In the upcoming games, we will have to raise our level and be in better shape to face the challenges.
"We need to work on our ball possession as we failed to keep the ball in our side in the last match. We are satisfied with our performance and we will come back strongly in the next match," she said.