Osaka wins; Djokovic halted by rain at Indian Wells

Naomi Osaka plays a return to Danielle Collins at the BNP Paribas Open at the Indian Wells Tennis Garden. (AFP)

Naomi Osaka rolled past Danielle Collins 6-4, 6-2 in the third round of the BNP Paribas Open on Monday night, keeping the world's No. 1 player on track to defend her title. 
Novak Djokovic, the top-ranked men's player, held serve to win his opening game against Philipp Kohlschreiber in their night match.
The German owned the advantage on his serve in the second game before rain began falling. The match was later suspended for the night. 
Collins struggled with her serve throughout the match, committing seven double faults and connecting on just 47 percent of her first serves. Osaka won her first career title at Indian Wells a year ago, propelling her to a career-best year in which she defeated Serena Williams for the US Open title.
She began this year winning the Australian Open and moving to the top of the rankings. After that triumph, she fired her coach and lost in the first round in Dubai before taking on a new coach, Jermaine Jenkins. 
Meanwhile, Venus Williams is turning back her own clock, moving into the fourth round with a 6-2, 7-5 victory over qualifier Christina McHale. 
Williams is seeking her 50th career WTA Tour title in the desert, where she has never won the event. And at 38, she's showing vintage form. 
Serena Williams, a two-time champion at Indian Wells, retired from her match on Sunday because of a viral illness. 
Fifth-seeded Karolina Pliskova eased past qualifier Ysaline Bonaventure 6-3, 6-2. No. 8 Angelique Kerber outlasted qualifier Natalia Vikhlyantseva 3-6, 6-1, 6-3 and No. 9 Aryna Sabalenka defeated 24th-seeded Lesia Tsurenko 6-2, 7-5. 
Two seeded women lost: No. 11 Anastasija Sevastova, who retired trailing 5-0 in the first set against No. 21 Anett Kontaveit, and No. 15 Julia Goerges, who lost to Mona Barthel 7-5, 1-6, 6-4.  On the men's side, No. 3 Alexander Zverev lost to German countryman Jan-Lennard Struff 6-3, 6-1.