After a poor start to the tournament -- a 0-3 loss to Argentina -- India produced a fine show to hold Olympic champions Germany 1-1 before dishing out another mediocre performance to lose 1-3 against title-holders Netherlands.
But an unpredictable India then saved their best for the tough quarterfinal clash against world no.4 Great Britain and eked out a close 2-1 win to progress to the last four stage.
"If you ask me whether we will be able to give a performance like this (against Great Britain) again, then frankly speaking I am not sure about it. But of course in the next two days we will work towards that," Oltmans said about India's inconsistent performance.
Barring a few glitches, the Indians were near perfect against Great Britain yesterday. The hosts sparkled in all departments of the game to produce their best performance of the tournament so far.
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But what has been inspiring for India in this tournament is the performance of its midfield led by talismanic skipper Sardar Singh.
The performance of the midfield, the link between forwardline and defence, is key to any team's success in international hockey and the likes of Sardar, Kothajit Singh and Manpreet Singh have stood upto the occasion, atleast here.
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India coach Oltmans too understands the significance of tomorrow's match when he said it's time for the past masters of the game to shine in major international events.
Going by world ranking, there is hardly anything to separate sixth-placed India and Belgium who are a rung below the hosts.
The match will also provide India a chance to avenge their 0-4 thrashing in the bronze medal play-off match of the Hockey World League Semifinal earlier this year.
But it will be easier said than done as the Red Lions looked more consistent in the tournament than their opponents.
"I thought they (India) played well. I think in the other games - the grading games - they were a bit inconsistent. But I thought they played well (against Great Britain) and they are going to be a really tough opponent," McLeod said.
The Belgium coach said coming into the tournament it was his wish to play India in their own backyard.
"A secret wish of mine was having the guys experience playing India in India. It's a fantastic opportunity for the guys and there will be big crowd in. We are looking forward to it," McLeod said.
Meanwhile in the other match of the day, Olympic champions Germany will play lowly Canada in the fifth to eighth place classification match.