Second seed Selin did not break a sweat as she outclassed third seed 6-1 6-3 in one hour and 15 minutes at the Dakshin Kalikata Sansad clay courts.
Selin will now fight it out with Ukrainian Diani Khodan, who rallied to beat France's Margaux Rouvroy 4-6 7-6(3) 6-4 in two hours and 35 minutes.
In boys singles U-18 category, unseeded Mathys Erhard's dream run ended with 2-6 4-6 defeat against Belgium's Louis Herman, seeded eighth.
Kilani breezed past Poland's Michal Woznaik by 7-6(3) 6-3.
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