Australian Open: Novak Djokovic, Stanislas Wawrinka and the Williams sisters in fourth round action

Top seeds Novak Djokovic and Serena Williams are both in fourth round action at the Australian Open on Monday.

Djokovic, a four-time winner in Melbourne, faces Luxembourg’s Gilles Muller, who reached the fourth round of a major for the first time after upsetting 19th seed John Isner.

Djokovic overcame a nervous start to defeat Fernando Verdasco on Saturday and he is the overwhelming favourite to defeat Muller, who is making his 10th appearance at the Australian Open.

Williams is in action against 24th seed Garbine Muguruza earlier on Monday. The American crashed out at the fourth round in Melbourne last year and she showed signs of rustiness during her previous match against Elina Svitolina, coming from a set down to progress.

Williams’ sister Venus is also in action at the Rod Laver Arena. She faces sixth seed Agnieszka Radwanska, who made short work of another American, Varvara Lepchenko, in the third round.

“Playing her is always a great challenge,” said Radwanska. “I think she is still playing great tennis even if she's a bit older.”

Defending men’s champion Stanislas Wawrinka is in action on Margaret Court Arena against Spain’s Gullermo Garcia-Lopez, while Great Britain’s Jamie Murray is in doubles action on Show Court 2 as he and Australian John Peers face Ivan Dodig and Marcelo Melo.

Order of play (from midnight):

Rod Laver Arena

(11) Dominika Cibulkova (Svk) v Victoria Azarenka (Blr)

(1) Serena Williams (USA) v (24) Garbine Muguruza (Spa)

(9) David Ferrer (Spa) v (5) Kei Nishikori (Jpn)

(18) Venus Williams (USA) v (6) Agnieszka Radwanska (Pol)

(1) Novak Djokovic (Ser) v Gilles Muller (Lux)

Hisense Arena

(12) Eric Butorac (USA) & Samuel Groth (Aus) v (6) Jean-Julien Rojer (Ned) & Horia Tecau (Rom)

(14) Yung-Jan Chan (Tpe) & Jie Zheng (Chn) v (4) Martina Hingis (Sui) & Flavia Pennetta (Ita)

(1) Bob Bryan (USA) & Mike Bryan  (USA) v (14) Dominic Inglot (Gbr) & Florin Mergea (Rom)

(12) Feliciano Lopez (Spa) v (8) Milos Raonic (Can)

Margaret Court Arena

(4) Stanislas Wawrinka (Sui) v Guillermo Garcia-Lopez (Spa)

Madison Keys (USA) v Madison Brengle (USA)

Show Court 2

(16) Jamie Murray (Gbr) & John Peers (Aus) v Ivan Dodig (Cro) & Marcelo Melo (Bra)

(1) Sara Errani (Ita) & Roberta Vinci (Ita) v (16) Julia Goerges (Ger) & Anna-Lena Groenefeld (Ger)

Su-Wei Hsieh (Tpe) & Pablo Cuevas (Uru) v Kai-Chen Chang (Tpe) & Ze Zhang (Chn)

(7) Martina Hingis (Sui) & Leander Paes (Ind) v Anabel Medina Garrigues (Spa) & Pablo Andujar (Spa)

Show Court 3

(1) Sania Mirza (Ind) & Bruno Soares (Bra) v Abigail Spears (USA) & Santiago Gonzalez (Mex)

Bethanie Mattek-Sands (USA) & Lucie Safarova (Cze) v (7) Caroline Garcia (Fra) & Katarina Srebotnik (Slo)

Simone Bolelli (Ita) & Fabio Fognini (Ita) v Oliver Marach (Aut) & Michael Venus (Nzl)

Lisa Raymond (USA) & Robert Lindstedt (Swe) v (5) Cara Black (Zim) & Juan Sebastian Cabal (Col)