Djokovic to serve in the opening game of the day.

WINNER! There it is! The end of Fish's hopes of lifting a first Slam. Looking a tired figure while Djokovic is surely a potential winner of the title. An easy enough victory. He is into the last eight. A 6-3 6-4 6-1 victory.

Djokovic looks like he is having a practice session out there. Fish's match in the last round against Arnaud Clement has obviously taken it out of him.

BREAK! Djokovic now two breaks to the good. All but over out there for the home hope.

Djokovic extends his advantage to two games. Fish looks like a spent force out there.

Fish pulls one back, but it is not looking good for him out there.

Djokovic can see the winning post and he is going for it. Compare Djokovic's performance to Andy Murray's last night and it is night and day. The Serbian is not complaining, just going about his business quietly and efficiently. Has grown in stature as this match has progressed.

BREAK! For the fourth time in this match, Fish is broken. He is cutting a sad sight out there as he surrenders his serve with his fourth double fault of the afternoon.

SET! Fish battled to retain his own serve, but he is helpless to prevent the Serbian from moving two sets ahead. A real uphill battle now for the American against a man he has yet to beat.

Fish does the necessary on his serve, but needs a break otherwise he faces tumbling out of this tournament.

Djokovic quickly moves to within one game of the second set. Doesn't feel like he has been on top form, but hasn't had to be. He has hit double the amount of winners of Fish and looks fresher than the American too.

Fish comes through that, but he is not exactly looking like a winner out there. Has made only one out of four break points.

Fish has chances to break, but Djokovic resists the American's advances, much to the chagrin of the home crowd on Arthur Ashe. Big game now for Fish. Can't afford to be broken again.

BREAK! Fish continues to bleed service games. Still struggling to get into this match and is now a break down in the second set.

Djokovic looking relaxed enough. Continues to dominate the longer the rallies go on. He holds again.

Some blistering exchanges between the two men there, but Fish is not being outhit. Seems to be moving well. Not labouring on Labour Day afternoon in the States.

The Djokovic camp look failry happy with their man's contribution. He levels up at 1-1. Pressure back on Fish to find some of the big serves for which he is renowned.

A better game from Fish on serve. Looked a bit tense in the first set, but hopefully he will settle down in the second set. He and Sam Querrey are carrying American hopes out there after Andy Roddick's untimely demise.

WINNER! Djokovic wraps up the first set. Never really in any danger. Fish will need to go up a few gears if he is going to trouble the third seed. Like Nadal and Federer, all too easy for him.

The home crowd trying to encourage Fish, but he has been poor in this first set on serve. Winning only 45% of points on his first serve, and 17% on his second. Djokovic will serve for it.

A handy lead for Djokovic in this opening set. Needs one more for the set. The home crowd not really involved in the action yet. Fish not giving them much to shout about so far.