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Dominic Thiem, Nicolas Almagro reach Argentina Open quarters

BUENOS AIRES, Argentina -- Fifth-seeded Dominic Thiem of Austria reached his second quarterfinals of the young season when he defeated qualifier Gastao Elias of Portugal 3-6, 7-6 (7), 6-3 in the Argentina Open on Wednesday.

Thiem, who at age 22 is the youngest player in the top 20, prevented Elias from making his first career ATP quarters.

In another second-round match in the clay-court tournament, 2011 champion Nicolas Almagro of Spain beat Federico Delbonis 6-3, 4-6, 6-4, his third win over the local hope after 2012 and '13.

Top-seeded Rafael Nadal, the defending champion, faces Juan Monaco of Argentina on Thursday in the second round.