Third seed Myeni got the better of fifth seed Belgian Yannick Mertens 6-3, 7-6 (6) to move into the last-four USD 50,000 Challenger event at the KSLTA Courts on Friday.
Sanam though exited with a 3-6 2-6 defeat against second seed Briton James Ward.
It was a smooth run in the first for Myneni but the Belgian made it good fight in the second.
There was no break of serve till the 10th. Myneni broke Mertens in the 11th but could not serve out the match. Instead he was broken by the Belgian and tie-breaker came into play.
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Myneni's semifinal opponent will be top seed Adrian Menendez-Maceiras, who had little problem in ousting Arthyr De Greef of Belgium 6-3 6-4.
The second semi-final will pit James Ward against Daniel Nguyen, who accounted for Italian Alessandro Bega 7-5 6-4.
In the doubles semi-finals, Wild Card entrants John Paul Fruttero (USA) and Vijay Sunder Prashanth ousted the third seeded pair of Ti Chen (Tpe) and Dane Propoggia (Aus) to move into the final.