Three years removed from being the No. 1 player in the world, Japanese tennis star Naomi Osaka's struggles continued at the Paribas Open on Saturday.

In a 6-0, 6-4 loss to Veronika Kudermetova in the second round, the 24-year-old was heckled by a fan in the Indian Wells crowd.

The fan was repeatedly yelling, "Naomi, you suck" as Kudermetova went to serve.

After the game, Osaka, who was brought to tears during the match, asked if the fan could be removed. She also asked if she could speak to the fan via the umpire's microphone. Her requests were denied, and play resumed.

After Osaka finished out the match, she waited for Kudermetova to address the crowd before asking to say some words herself.

"To be honest, I've gotten heckled before, it didn't really bother me," Osaka said.

"But heckled here, I watched a video of [the Williams sisters] getting heckled here, and if you've never watched it, you should watch it. I don't know why, but it went into my head, and it got replayed a lot. I'm trying not to cry."

Osaka was referring to an incident involving the Williams sisters that occurred in 2001, when Serena was jeered all throughout a match with Kim Clijsters.

The anger was funneled to Serena because of suspicions that her father, Richard, had a hand in Venus' injury withdrawal in the semifinals, which was slated to be between Venus and Serena.

Both sisters boycotted the tournament for several years. Serena didn't return until 2015, and Venus participated in 2016.

Osaka has long worn her heart on her sleeve. When she was the No. 2 player in the world, she made headlines for withdrawing from Wimbledon in 2021, citing her mental health. Osaka talked openly about her struggles with anxiety and mental health at that time.

Her struggles have been ongoing since she won the 2021 Australian Open. She pulled out of two tournaments and took a break after losing in the third round of the US Open. The Paribas Open was her first tournament since she lost in the third round of the 2022 Australian Open.

Osaka is next scheduled to appear at the Miami Open later this month.