India No. 2 and world No. 75 Mangaonkar fashioned a creditable 11-6 11-7 3-11 12-10 win over the former world No. 7 in a quarter-final contest that lasted 61 minutes at the Cricket Club of India courts.
Mangaonkar set up a semi-final clash with Nasir Iqbal of Pakistan who overcame fifth seed Jaymie Haycocks of England 11-5 11-8 11-7.
However, his compatriot Harinder Pal Sandhu crashed out of the tournament, beaten by sixth seed Zahed Mohamed of Egypt 11-6, 11-7, 2-11, 11-9 in another quarter-final encounter that lasted 54 minutes.