Djokovic battles through to last eight in US Open

Novak Djokovic battled illness, a back problem and the considerable challenge of Juan Monaco to reach the US Open quarter-finals in New York.

Third-seeded Djokovic, from Serbia, took three hours and 53 minutes at Arthur Ashe Stadium to beat the number 23 from Argentina 7-5 7-6 (7-2) 6-7 (6-8) 6-1 and progress to the last eight, where he will play Spain’s Carlos Moya, the 17th seed and a fourth round victor over unseeded Ernests Gulbis.