Top seed Novak Djokovic lost a set to Canadian teenager Denis Shapovalov but cleaned up his game in time to reach fourth round of the Australian Open with a 6-3 6-4 4-6 6-0 victory on Saturday.

Djokovic’s request to turn off the artificial lights was ignored during the third set. He lost his composure temporarily losing two consecutive break of serves to concede the  third set.

“The lights being switched on at 5pm was completely unnecessary,” Djokovic said, adding that he should not have let it get to him. “I was agitated. It should not happen to me. I should know better. I have experience. But it does happen. I allowed him to come back to the match. Other than when I was 4-1, 4-2 up in the third set and had a little let-down, I thought I played well, especially in the fourth set. I expected Denis to come out and be aggressive. He made a lot of unforced errors for the first set and a half. I just stayed solid from back of the court and served well, played the right shots. But I like the fact that I was tested.”

On the women’s side, number 1 seed Simona Halep sent American Venus Williams packing  with 6-2, 6-3 victory. Halep next plays Serena Williams.

Canadian Milos Raonic defeated former Australian Open champion Stan Wawrinka in 4 tie-break sets to move to the third round. In a match lasting over four hours that began under open skies and finished with the roof closed on Rod Laver Arena following a rain delay, Raonic won 6-7 (4-7), 7-6 (8-6), 7-6 (13-11), 7-6 (7-5).

19-year old Australian, Alexei Popyrin, upset seventh seed Dominic Thiem, who was forced to retire during their round-two match. Thiem could not continue because of illness. Popyrin led 7-5, 6-4, 2-0 at the time Thiem’s retirement.

Serena Williams was all business in the second round, easily beating Eugenie Bouchard 6-2 6-2 on Rod Laver Arena. Williams said “It wasn’t an easy match tonight. Genie has been to the finals of Wimbledon and the semifinals of other Grand Slams, so I said, ‘You’ve got to come out hot, come out firing.’

“I haven’t had many matches since last year, but it’s okay. I got to spend time with my daughter, and that matters the most to me. I’ve always been told that they grow up so fast, so I wanted to be able to take that time and say I spent it with her. It means a lot to me.”