Novak Djokovic collapses in Shanghai heat but battles back to reach last eight

The 38-year-old is the oldest man to reach the quarter-finals of an ATP Masters 1000 event.

Novak Djokovic celebrates after defeating Jaume Munar. Pic: Andy Wong/AP

Novak Djokovic collapsed on court at the Shanghai Masters before recovering to beat Jaume Munar.

Brutally hot and humid conditions have taken their toll on a number of players in China this week and, after appearing to vomit during a long previous match, Djokovic was in trouble again during a 6-3 5-7 6-2 win over Spaniard Munar.