Latest updates: Australian Open 2018, day nine at Melbourne Park

After a night of upsets that saw Hyeon Chung topple Novak Djokovic and Tennys Sandgren defeat Dominic Thiem, the top men's seeds will want to see normality resume when they take to the court on Tuesday.

Fresh from his four-set win over Nick Kyrgios on Sunday night, World No. 3 Grigor Dimitrov takes on Brit Kyle Edmund this afternoon on Rod Laver Arena. Kyrgios told the Bulgarian to "believe" as he shoots for his first major crown while Edmund will be hoping he has enough gas left in the tank after playing two five-setters and a four-setter in his past three matches.

Top seed Rafael Nadal surrendered his first set of the tournament to Diego Schwartzman in his last start and will be wary of Marin Cilic, who came back from a set down to defeat Pablo Carreno Busta in the round of 16.

On the women's side 22-year-old Elise Mertens can continue her dream run at Melbourne Park with victory over World No. 4 Elina Svitolina and Caroline Wozniacki — fresh from hitting her first ever successful tweener in a match — may need to pull out some more tricks to overcome veteran Carla Suarez Navarro.

ROD LAVER ARENA
11am

(6) Bob Bryan-Mike Bryan defeated (15) Marcin Matkowski-Aisam-Ul-Haq-Qureshi 6-1 6-4

(4) Elina Svitolina (UKR) vs Elise Mertens (BEL)

(3) Grigor Dimitrov (BUL) vs Kyle Edmund (GB)

(1) Rafael Nadal (SPA) vs (6) Marin Cilic (CRO)

(2) Caroline Wozniacki (DEN) vs Carla Suarez Navarro (SPA)

MARGARET COURT ARENA
1pm

(1) Lukasz Kubot-Marcelo Melo vs Ben McLachlan-Jan-Lennard Struff

(2) Elena Vesnina-Ekaterina Makarova vs Gabriela Dabrowski-Yifan Xu

(6) Edouard Roger-Vasselin-Andrea Sestini Hlavackova vs Nadiia Kichenok-Marcel Granollers

(8) Gabriela Dabrowski-Mate Pavic vs Demi Schuurs-Jean-Julien Rojer

Kyrgios fined again

Nick Kyrgios has been fined nearly $2500 for not being ready to start his third round match against Jo-Wilfried Tsonga on time.

The umpire slapped Kyrgios with a code violation because he wasn't prepared to start the first point within one minute of the five minute warm-up period ending.

It's the second time the Aussie has been hit in the hip pocket this tournament. He had to fork out more than $3700 for telling hecklers in the stands to "shut the f*** up" during his opening round win over Rogerio Dutra Silva.

Bryan brothers march on

Bob and Mike Bryan have kept their hopes of a 17th grand slam title alive after demolishing Marcin Matkowski and Aisam-Ul-Haq-Qureshi in straight sets.

The American duo took one hour and six minutes to wrap up the 6-1 6-4 victory on Rod Laver Arena. Matkowski and Qureshi did well to keep the No. 6 seeds on court for as long as they did after an opening set bloodbath that suggested things were going to get ugly.

The Bryan brothers led 5-0 after only 16 minutes before their opponents finally got on the board, and the No. 15 seeds provided a much tougher test in the second set, although their resilience had no impact on the result.

Channel Seven star's cheeky Will Smith sledge

Will Smith made waves in Melbourne when he watched on courtside as Nick Kyrgios defeated Jo-Wilfried Tsonga in the third round, but he hasn't won over everyone.

Channel Seven presenter Melanie McLaughlin took a cheeky jab at the Hollywood icon for his role in a video alongside Aussie wheelchair tennis star Dylan Alcott.

The broadcaster played a video of Alcott and Smith together boasting how they would be the most formidable doubles pairing in the world right before McLaughlin interviewed Alcott's Australian Open doubles partner Heath Davidson.

Davidson teams up with Alcott again at the year's first major, the pair having won a gold medal in the men's quad doubles at the 2016 Rio Olympics, but you'd think it was out of sight out of mind for the 30-year-old in Alcott's funny clip.

"I apologise to our next guest for what we just saw with two, well I guess he's going to say nobodies, I don't know who they were," McLaughlin joked.

"Heath Davidson — the man who's proudly responsible for one of the gold medals Dylan Alcott won — I'm sorry you had to listen to that."

Davidson then took a sly pot shot at Alcott himself.

"Dylan just completely threw me under the bus there, giving me no credit and ditching me for Will Smith," Davidson said. "He's all about stardom which is alright but I'm all about winning tournaments."

Obviously, the exchange was all in good fun and McLaughlin and Davidson were only kidding.

Still, we wonder what will hurt Smith more — being called a "nobody" or Kyrgios saying he always watches the movie Focus , but only because Margot Robbie stars in it?

'Kim Jong-un beat him 6-0 6-0'

Channel Seven has copped heat for the amount of cross promotion and advertising during its coverage but Nathan Templeton did his best to restore people's faith in the network with a funny one-liner to cap off his take on Hyeon Chung on radio on Tuesday morning.

Templeton is at Melbourne Park for the broadcaster and couldn't help himself when speaking to SEN Breakfast about Chung's incredible upset over Novak Djokovic on Monday night. He saw an opening and he went for it right at the end of his chat.

"Just quickly on Chung, while he has become a bit of a star he's not the best player on the Korean peninsula," Templeton said. "Apparently Kim Jung-un beat him 6-0 6-0."

Chung is South Korean and Kim Jung-un is the dictator of North Korea, but the joke still stands. Advantage, Mr Templeton.

Earlier in the same segment the topic of Rafael Nadal's grunting was raised. Grunting came into the spotlight when Belarusian Aryna Sabalenka played Aussie Ash Barty, attracting criticism for the volume and timing of her grunts, which some said was a tactic to put the Queenslander off her game.

Nadal has always been a grunter, but

"The grunting metre will be up," SEN's Garry Lyon said. "We're staggered that Sabalenka got hung, drawn and quartered and then Rafa comes out and grunts like a hairy grunter."

"Yeah it's like it's one rule for one and another rule for others, isn't it?" Templeton responded.

"He's such a likeable bloke in every other way Rafa he gets away with it but you're right. I think the thing that annoys people about Rafa is that he hits the ball and then the grunt comes a second or two later which can be a little bit distracting for the opponent because they're just about to hit the ball."