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By Ian Ransom
![Australian Open]({"default":{"load":"default","w":"80","h":"58","src":"//img-s-msn-com.akamaized.net/tenant/amp/entityid/AAT4v4Z.img?h=579&w=799&m=6&q=60&o=f&l=f"},"size3column":{"load":"default","w":"62","h":"45","src":"//img-s-msn-com.akamaized.net/tenant/amp/entityid/AAT4v4Z.img?h=452&w=624&m=6&q=60&o=f&l=f"},"size2column":{"load":"default","w":"62","h":"45","src":"//img-s-msn-com.akamaized.net/tenant/amp/entityid/AAT4v4Z.img?h=452&w=624&m=6&q=60&o=f&l=f"}})
MELBOURNE (Reuters) – Danielle Collins won a battle of attrition in scorching heat to overhaul Elise Mertens 4-6 6-4 6-4 and book her second quarter-final at the Australian Open on Monday.
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In a gruelling clash of former semi-finalists, the American 27th seed snatched the win with a barrage of power hitting as Mertens served to stay in the match.
Belgian Mertens saved two match points, the second with a gutsy second serve, but then surrendered meekly on the third with a double-fault.
Collins will play the winner of Simona Halep and Alize Cornet for a place in the semi-finals.
(Reporting by Ian Ransom in Melbourne; Editing by Peter Rutherford)
Tennis-Collins wins gruelling Mertens clash to reach quarter-finals (msn.com)