Australian Open 2017 Day 4 Live Score Match Updates

It's Day 4 with Djokovic and Nadal up for Round 3!

Updated: 19 January 2017 16:28 IST - Published: 19 January 2017 08:08 IST

The contest between Rafa Nadal and Marcos Baghdatis is underway.

Result updates:

Caroline Wozniacki defeats Donna Vekic 6-1, 6-3
Serena Williams defeats Lucie Safarova 6-3, 6-4
Milos Raonic defeats Giles Muller 6-3, 6-4, 7-6
Dominika Cibulkova defeats Su-Wei Hsieh 6-4, 7-6

Denis Istomin YOU GIANT KILLER - He has defeated Novak Djokovic 7-6, 5-7, 2-6, 7-6. 6-4

Novak Djokovic is in big trouble here and he is staring at an exit from the Australian Open. He is down 5-3 in the fifth set and will now serve to stay in the match.

Gael Monfils has defeated Alexandar Dolgopolov in an exciting encounter.

He does it!!!! Istomin has taken this match to the fifth set by winning the fourth in a thrilling tiebreak.

Novak has levelled proceedings by holding his serve. It is 5-5 in the fourth set and Djokovic can still avoid going to the fifth.

Istomin holds serve to lead 5-4 in the fourth set but Novak can draw level by holding his serve.

Just when you think he is down, Djokovic shows why he is World No. 2. He breaks Istomin and now is serving at 3-4 in the fourth set with a chance to level.

Istomin s turning on the screws here and has taken a 4-1 lead in the fourth set. This looks like we are going to a fifth. Brilliant from Istomin.

Istomin serves first in the fourth set and if he can get an early break, he has a chance of going into the fifth.

He does it. Novak Djokovic takes the third set and Istomin is looking out of sorts.

As the match is progressing, Novak Djokovic is gaining more and momentum. He is forcing Istomin to work really hard. He is now serving for the third set. (6-7, 7-5, 5-2)

Djokovic has upped his intensity and pace at the right moment. Forcing Istomin into a forehand error, the Serb has carved out his first break of the third set to lead 2-1.

It is an error-filled third set so far and they are locked at 1-1 currently.

Djokovic has served out the second set successfully, 7-5. The two players are now tied at one set apiece.

And the second seed BREAKS!!!!! It is 6-5 for Djokovic!!

Now Djokovic has a break point on the Istomin serve. There was never any doubt about it!

And the Serb levels it at 5-5 just like a champion!

That is exactly what you expect from the six-time Australian Open champion!!!!

And he saves the second with an ace!

Djokovic saves one with a big forehand winner!

Would you believe it? Istomin now has two set points!!!!!!

Getting back to the Djokovic match now. He is now serving to stay in the set at 4-5.

UPDATE: Meanwhile, World No. 116 Jennifer Brady has caused a big upset as she sends the British No. 2 Heather Watson home with a 2-6, 7-6(3), 10-8 win.