Murray will play Santiago Giraldo in the third round after the Colombian beat Australia's 25th seed Bernard Tomic 6-4 6-1 6-3.

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Ferrer will now face seventh seed Jo-Wilfried Tsonga for a place in the semifinals, after the Frenchman saw off Colombian qualifier Santiago Giraldo 6-3 6-4.

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Seventh seed Jo-Wilfried Tsonga beat Colombian qualifier Santiago Giraldo 6-3 6-4 and will face Ferrer in the last eight, while fifth seed Robin Soderling went down 6-3 6-2 to Stanislas Wawrinka .

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Tenth seed David Ferrer was taken to three sets in a 3-6 6-3 6-4 victory over Alexandr Dolgopolov but 13th seed Jurgen Melzer had little trouble in dispatching qualifier Santiago Giraldo 6-1 6-4.

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But 19th seed Mardy Fish , runner-up to Roger Federer in Cincinnati , recovered from a mid-match wobble to overcome Jan Hajek 6-0 3-6 4-6 6-0 6-1 and 23rd seed Feliciano Lopez beat Santiago Giraldo in straight sets.

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The eventual winner will play Thiemo De Bakker of the Netherlands in the next round, who was involved in another marathon battle with Santiago Giraldo, before coming through 16-14 in the final set - although that match lasted a mere four hours and six minutes.

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