Record-shattering Novak Djokovic said he was hanging in there after becoming the first player to win 400 Grand Slam matches Saturday on his way into the last 16 at the Australian Open.
The 38-year-old Serbian great swept past Dutchman Botic van de Zandschulp 6-3, 6-4, 7-6 7/4 in front of a boisterous crowd on centre court to extend his own all-time record of match wins at the majors.
Roger Federer 369 and Serena Williams 365 are next best.
