And ninth seed Daniela Hantuchova saw off France's Alize Cornet 6-2 7-5 to continue her progress.
Robredo beat John Isner 6-7 6-3 7-6 after Sanchez saw off American Melanie Oudin 6-4 6-4.
Earlier in the debate the government easily saw off several attempts to amend the controversial legislation.
Poachers saw off a darted rhino's horn, leaving the animal to bleed to death.
The Blues saw off challenges from Glentoran, Portadown and Derry City to land the highly-rated midfielder.
Slovakian Hantuchova saw off American Vania King 6-2 6-3 earlier on Friday with an impressive performance.
Williams, the reigning Wimbledon, Olympic and U.S.Open champion, saw off 19-year-old Sloane Stevens 6-4 6-3.
Mark Sanford comfortably saw off a rival in Tuesday night's run-off poll to become his party's candidate.
BBC: Mark Sanford wins comeback nomination for Congress seat
Palmer, who has twice won the British Open, saw off Frenchman Gregory Gaultier 11-6 4-11 11-2 11-2.
Ms Marwick, 57, saw off a challenge from party colleague Christine Grahame and former Labour minister Hugh Henry.
Carter saw off a battling Tian Pengfei and recovering from two frames down to eventually edge through 5-3.
Another shock came when wild card Joachim Johansson saw off the challenge of fourth-seeded Fernando Gonzalez of Chile.
The Black and Whites reached Wembley by beating Wakefield 32-24 while holders Saints saw off Leeds Rhinos 26-16.
In the late 1990s, Mr Howard adroitly saw off a xenophobic challenge from Pauline Hanson's One Nation party.
Earlier, world number nine Vera Zvonareva saw off the spirited challenge of Japanese teenager Ayumi Morita 6-2 6-2.
Sharapova, beaten by Azarenka in the Australian Open final, also saw off Makarova in straight sets in Melbourne.
Carragher hit the post but Liverpool saw off QPR 1-0 at Anfield with Philippe Coutinho scoring the only goal.
Nadal will now face France's Jo-Wilfried Tsonga, who saw off Stanislas Wawrinka 2-6 6-3 6-4 in his quarterfinal tie.
Lille saw off Bordeaux 2-1 in the day's late game thanks to goals from Ronny Rodelin and Salomon Kalou.
Jacobs saw off 141 deliveries in a crucial innings of 60 not out.
Home favourite Pat Rafter enjoyed a far smoother ride as he saw off Germany's Oliver Gross 6-2 6-4 6-3.
They saw off the challenge of the Soviet Union and stepped, drove, why even played golf on another celestial orb.
Brazil saw off the challenge of a slightly disappointing Chile to seal a mouth-watering quarter-final tie against the Netherlands .
They saw off a rival bid from National Basketball Association team owner Mark Cuban and Houston freight-forwarding executive Jim Crane.
He hit the winner as Sir Alex Ferguson's side saw off Aston Villa to win the Carling Cup on Sunday.
Williams will now meet Kim Clijsters in the final, after the Belgian saw off compatriot Justine Henin in three tough sets.
Nadal will now face compatriot and ninth seed Juan Carlos Ferrero, who saw off fifth seed Jo-Wilfried Tsonga 6-1 3-6 7-5.
O'Sullivan recorded breaks of 56, 61, 49, 78, 69 and 68 as he saw off the challenge of Michael Judge 5-2.
Tursunov saw off Gilles Muller of Luxembourg 7-6 1-6 7-5, while Czech star Berdych overcame Poland's Jerzy Janowicz 6-3 6-7 6-3.
The All Blacks next play England, who saw off Argentina 16-9 at Twickenham in a poor quality match in difficult conditions.
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