ROGER Federer and Novak Djokovic both enjoyed comfortable wins to reach the third round of Australian Open Tennis.

Federer beat world number 41 Filip Krajinovic of Serbia 6-1, 6-4, 6-1 to maintain his bid to match Djokovic’s seven Australian Open titles.

The Swiss, 38, wrapped up victory in 92 minutes and will face Australia’s John Millman next.

Djokovic, the defending champion, dismissed Japanese wildcard Tatsuma Ito 6-1, 6-4, 6-2 in 95 minutes.

The 32-year-old Serb, chasing a 17th Grand Slam title, faces Japan’s Yoshihito Nishioka next after he knocked out British number one Dan Evans.

Djokovic has been working on his serve with former Wimbledon champion Goran Ivanisevic and fired down 16 aces against Ito.

“My serve was working extremely well in the first and second rounds. That’s something I worked on in the off-season,” he said.

“One of the priorities of the training sessions is trying to get that advantage of winning a lot of easy points on the first serve. It has been paying off so far.”

Federer is competing at Melbourne Park for a 21st consecutive year and has reached at least the last 32 on every occasion.

He came into the tournament without playing any warm-up events but has only dropped 13 games in his two matches.

However, Millman, who saw off Polish 31st seed Hubert Hurkacz in straight sets, beat Federer at the 2018 US Open.

“I think the match is really going to be a test for me because John is fit like a fiddle,” said the Swiss. “He’s from this country, so naturally also it’s going to be different intensity.”

Italian eighth seed Matteo Berrettini became the highest-ranked player to exit, losing in five sets to Tennys Sandgren.

Berrettini fought back after losing the first two sets but American world number 100 Sandgren went on to win 7-6(9-7), 6-4, 4-6, 2-6, 7-5.

Sandgren’s compatriot Tommy Paul, the world number 80, also pulled off a five-set upset. The 22-year-old beat Bulgarian 18th seed Grigor Dimitrov 6-4. 7-6(8-6), 3-6, 6-7(3-7), 7-6 (10-3).

Dimitrov was two points from victory at 5-4 and 30-love in the fifth set but lost his serve and then went out after a four-hour 19-minute marathon match.

Croatia’s Marin Cilic was another to edge a tense five-setter, beating French 21st seed Benoit Paire 6-2, 6-7(6-8), 3-6, 6-1, 7-6(10-3).

Cilic is unseeded at a Grand Slam for the first time since the 2014 Australian Open but is a former US Open champion and the 2018 Australian Open runner-up.

Italy’s Fabio Fognini, the 12th seed, was one seed to survive a five-set match, eventually seeing off Australia’s Jordan Thompson 7-6(7-4), 6-1, 3-6, 4-6, 7-6(10-4) after more than four hours on court.

Meanwhile, sixth seed Stefanos Tsitsipas did not even have to hit a ball to reach the last 32 after opponent Philipp Kohlschreiber withdrew injured.

Organisers said the 36-year-old German had a muscle strain.

Greece’s Tsitsipas, 21, will face Milos Raonic in the last 32 after the Canadian saw off Cristian Garin of Chile in straight sets.

Exciting 18-year-old Jannik Sinner was unable to make it past the second round, losing 6-4, 6-4, 6-3 to Hungary’s Marton Fucsovics. (BBC Sport)