MELBOURNE, Australia -- If Novak Djokovic was trying to impress his new coach, Boris Becker, as Andy Murray suggested he might, the four-time Australian Open champion undoubtedly pulled it off with his 6-3, 7-6 (2), 6-1 victory over Lukas Lacko on Monday night.
But then Djokovic's on-court, postmatch interview with former champ Jim Courier, commentating for Australian TV, accomplished that as well.
Bantering with Courier about his recent engagement and his 23-match winning streak since his proposal, Djokovic was in a good mood after notching a win in his first "official" match since hiring Becker, who laughed hard from his courtside seat and exchanged fist bumps with his new team members.
Murray, whose coach is former champion Ivan Lendl, said trying to gain approval from a new coach who was also a great player himself, particularly in the first few months, is like impressing a new girlfriend.
"I guess that's natural," Murray cracked.
Djokovic said he hopes Becker, a former six-time Grand Slam champion, will give him a "mental edge" and an "aggressive mindset," particularly in the late stages of the biggest tournaments.
He called himself "a bit rusty," and Djokovic's aggressive play against the 96th-ranked player in the world did not always translate to his best play with 40 winners against 30 unforced errors. But it was good enough for the No. 2 seed and three-time defending champ, who kicked off a Day 1 night session that also included top-seeded Serena Williams' 6-2, 6-1 victory over 17-year-old Australian Ashleigh Barty.
Drama on Monday night came in the first significant upset of the tournament, as Thailand's Luksika Kumkhum defeated sixth-seeded Petra Kvitova 6-2, 1-6, 6-4. For the 2011 Wimbledon champion, it was her first Grand Slam loss since the US Open the same year.
Luksika, playing in just her second Grand Slam tournament, reached the second round here last year.
Also advancing Monday was American Alison Riske, ranked 53rd, who defeated 28th-ranked Elena Vesnina 6-2, 6-2. Riske, in the same quarter of the draw as Luksika, would meet her in the fourth round if both survive.
If Barty had dreams of pulling off a miracle before her home fans, that notion was put to rest in a crisp 57 minutes against Williams. The American is looking for her first title here in four years and her 18th career Grand Slam win, which would tie her with Chris Evert and Martina Navratilova for fourth place all time.
"I don't think 'disappointed' is the right word," Barty said. "It was a fantastic experience for me. I think Serena really showed why she's one of the greatest champions of all time. I mean, it was an absolute pleasure to be out there and have the chance to play against her."
Williams looks to be continuing where she left off in 2013, when she went 78-4 with 11 titles, including the French and US Opens. Against Barty, Williams entertained herself by coming to the net 11 times in the brief match. Beyond that, her goals are simple.