Seeded ninth in this week-long event sanctioned as Group 1 by the International Tennis Federation, Rushby overcame a first set loss to topple top seed and world No. 5 Karan Rastogi of India, 1-6, 6-3, 6-1, for the biggest shocker of the day.
Wozniacki, seeded 14th, and Bonifante followed it up with a pair of surprises in the girls divisions as the two downed No. 3 Sanaa Bhambri of India, 4-6, 7-5, 6-2, and sixth pick Hwang I-Hsuan of Chinese Taipei, 6-0, 6-2, respectively.
Wozniacki and Bonifante thus arranged a quarterfinal duel today while Rushby, ranked 47th in the world, faces eighth seed Australian Lachlan Ferguson, a 6-4, 6-3 winner over 14th pick Antal Van der Duim of the Netherlands in the boys quarterfinals.
It was also Ferguson who booted out the last of the Filipinos14-year-old Kyle Joshua Dandanwith a closely-fought 7-6 (4), 7-5 win in Wednesdays second round.
Rastogi, Bhambri and Hwang thus joined boys second seed Remko De Rijke of the Netherlands, who was the first biggest seed to bow out following a second round 5-7, 6-4, 6-1 loss to Tristan Nahon Farron of Ireland, out of the tournament.
The sensational Mahon Farron continued his run with a 6-4, 6-3 trouncing of Todd Ley of Australia that arranged him a quarterfinal collision with 11th seed Jamie Murray of Great Britain, who stunned No. 6 Divij Sharan of India, 3-6, 6-3, 7-5.
Also booking seats in the round-of-eight were fourth pick William Ward of New Zealand, fifth seed Coen Van Kuelen of the Netherlands, No. 7 Tushar Liberhan of India and third pick Joel Kerley of Australia.
Ward walloped Sumu Wahyu Trijati, 6-4, 6-1; Van Kuelen edged Rupesh Roy of India, 6-1, 4-6, 6-2; Liberhan outlasted Philipp Oswald of Austria, 7-5, 6-3; and, Kerley smashed Victor Leonte of Romania, 6-0, 6-3.
Unlike in the boys side, the girls favoritestop seed Chan Yung-Jan and No. 2 Hsu Weh-Hsin both of Chinese Taipeihad little trouble making the next round.
Chan smothered Daniella Dominikovic of Australia, 6-1, 6-1, while Hsu had an easier time in bashing Hanne Skak Jensen of Denmark, 6-0, 6-0, to forge a quarters showdown with No. 8 Kim So Jung of Korea and fifth seed Tatjana Malek of Germany, respectively.
Also making the next round were Michaela Johansson of Sweden, who bested Yurika Sema of Japan, 6-1, 6-1, and Septi Mende of Indonesia, who defeated Chen Yi of Chinese Taipei, 7-5, 6-3.
This event is made possible by Mitsubishi Lancer, the Philippine Tennis Association, Philippine Sports Commission, Department of Tourism, Traders Hotel, Wilson Balls, Summit Natural Drinking Water and Drewberry cookies.