New Delhi: Promising India striker Yuvraj Walmiki was on Thursday ruled out of the remainder of the men's hockey Olympic Qualification tournament due to a hamstring injury.

Walmiki sustained the injury during India's third round-robin match against France on Tuesday and did not play in the hard-fought 3-2 win over Canada last night.

It is suspected that Walmiki has aggravated a previous injury and might take at least 21 days to get back to match fitness.

"He (Walmiki) underwent an MRI scan yesterday and reports suggest that he is suffering from a hamstring tear, which will probably take 7 to 10 days to repair," India coach Michael Nobbs told reporters at the Major Dhyan Chand National Stadium ahead of tomorrow's final round-robin match against Poland.

"We fear he might have aggravated a previous injury. In that scenario, he will take at least 21 days to recover. He is a very talented player and crucial to our scheme of things. So, we will carefully look into his rehabilitation," he said.

Nobbs conceded his side will miss Walmiki but said he has enough resources in the squad to make up for his loss.

"As per the rules of the tournament, we can't call for a replacement. But we have 17 more players in the squad. We may use (defender) Rupinder Pal Singh in the forward-line tomorrow because we used him successfully in this position in Australia," Nobbs said.

Nobbs hinted that he will continue to experiment with the side and might play both the goalkeepers -- captain Bharat Chetri and P R Srejeesh -- alternatively tomorrow.

"The rotation system has been very successful for us. It enable us to field fresh players. We may play both Bharat and Chetri tomorrow. They may play half a game each," Nobbs said.

"We will try a few things, but we will play to win." Both Chetri and Sreejesh were the cynosure of today's training session as the coach put the duo on an exercise to stop goal-bound shots with their team-mates firing from all angles from short distance.

"The drill was basically aimed at sharpening them up. They had very good games in the tournament but did not get enough shots at their goal," Nobbs said.

Chetri said, "We did not get enough tries at our goal in the last four games. So, the shooting exercise was aimed at sharpening our reflexes and rhythm."

(Agencies)