Novak Djokovic angrily blamed floodlights for dropping a tournament set for the first time as he beat Denis Shapovalov 6-3, 6-4, 4-6, 6-0.
Novak Djokovic beat Denis Shapovalov 6-3, 6-4, 4-6, 6-0 to enter the Round of 16 at Australian Open.
Novak Djokovic defeated Jo-Wilfried Tsonga 6-3, 7-5, 6-4 in straight sets.
Djokovic, appearing in his 300th Grand Slam match, did drop his second service game to go 1-2 behind in the first set but broke back immediately.
Roger Federer and Novak Djokovic are both gunning for a record seventh Australian Open crown.
Andy Murray said he would like to finish at his home Grand Slam in Wimbledon, but ruefully admitted he might not make it that far.
Novak Djokovic will start his drive to make history against a yet-to-be-decided qualifier and could meet France's Jo-Wilfried Tsonga in the second round.
Simona Halep takes the top seeding among the women courtesy of her world number one ranking.
To win the decisive tie-break, a player will need to be the first to 10 with an advantage of at least two points.
Roger Federer will be aiming for a third successive Australian Open.
Roberto Bautista Agut defeated Novak Djokovic for the second time in his career.
Novak Djokovic will be up against Spain's Roberto Bautista Agut in the semi-final.
The match between Novak Djokovic and Marton Fucsovics lasted exactly two hours.
Playing in Qatar is an established part of Novak Djokovic's warm-up for the Australian Open.
Novak Djokovic is the favourite to dominate in 2019, after overcoming an injury-hit start to 2018 to claim the Wimbledon and US Open titles.
Novak Djokovic had won the three-day event earlier in 2011, 2012 and 2013 successively stamping his authority.
Williams returned from giving birth to her first child to reach the 2018 Wimbledon and US Open finals, but suffered upset losses in both to leave her stuck on 23 major wins.
Alexander Zverev faltered just once when Novak Djokovic broke him early in the second set but that was the only blemish on an extraordinary performance.