Coach van Ass, who recently took up the assignment as India's national coach, wanted to test out alternate penalty corner shooters ahead of the Olympics, just in case both ace flickers V R Raghunath and Rupinder Pal Singh were not available at crucial junctures.
"We now have some alternative, I am very happy for Jasjit who works hard in the field," said van Ass. "The good thing is to have penalty corner options."
Jasjit, who made his debut as a half-back during last year's World Cup at The Hague, was picked as the second drag-flicker for this tournament.
Raghunath was to be the first-choice penalty flicker here in Antwerp, backed by Jasjit, while Rupinder was to be rested.
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After the team was chosen, Raghunath got injured during the preparatory camp and Rupinder came into the squad.
Rupinder got injured in a warm-up game here in Antwerp and did not feature in any game during the preliminary round.
Seven minutes later, Jasjit scored again with another rasping drag-flick in what was India's matchwinner in the quarterfinal encounter.
India had earlier opened the scoring through Satbir Singh in the third minute, only for Malaysia to get into the driver's seat with two penalty corner conversions by captain Razie Rahim (15th minute) and Shahril Saabah (23rd).