Chandigarhs Swarit Patel, seeded in the 9 to 16 category pulled off an upset victory over second seed Harshal Rana from Haryana, winning a tough four-game match to advance to the Boys U-15 semi-finals in the four-star Willingdon Sports Club Squash Classic Open on Tuesday. Patel won 12-10, 11-9, 4-11, 11-9 to set up a clash with Karnatakas Shreshet Iyer, seeded third.