Chela through to quarters in US Open

Juan Ignacio Chela outlasted Stanislas Wawrinka in an erratic match at Flushing Meadows to reach the last eight of the US Open in New York.

The Argentinian 20th seed defeated his Swiss opponent 6-4 2-6 6-7 (6-8) 6-1 6-4 in three hours 41 minutes at Louis Armstrong Stadium and now awaits the winner of the all-Spanish fourth round meeting between second seed Rafael Nadal and number 15 David Ferrer.