Tennis star Coco Gauff stormed into the second round of the National Bank Open with a 6-1, 6-3 victory over fellow American Madison Brengle.

The 18-year-old will now face Wimbledon champion Elena Rybakina as she prepares for the US Open.

Gauff was in high spirits following her victory against Brengle, even giving the career advice to the chair umpire.

As she shook Jesse Greene's hand, she told him: “Your voice sounds like a TV announcer”.

The star then went to wave at the crowd, before continuing her hilarious conversation with the official.

"You should be a voice actor," Gauff said. "I'm serious. For extra money on the side.

"You sound like a cartoon character—in a good way. You have the most satisfying voice."

Greene appeared to take the career advice well, laughing as he started to get down from his chair.

Video: Watch Coco Gauff tell umpire he sounds like "a cartoon character"

Gauff then took the opportunity to praise Serena Williams during her post-match press conference, hailing the 23-Grand Slam winner for the legacy she will leave.

“She’s just been playing forever, my whole life,” she said. “The legacy that she’s left throughout her tennis career is something that I don’t think any other player can probably touch.

“I think that the legacy that she’ll continue to leave throughout her life is something that can inspire many more generations.”

Coco Gauff celebrates
SAN JOSE, CALIFORNIA - AUGUST 04: Coco Gauff reacts against Naomi Osaka of Japan during the Mubadala Silicon Valley Classic, part of the Hologic WTA Tour, at Spartan Tennis Complex on August 04, 2022 in San Jose, California. (Photo by Carmen Mandato/Getty Images)

Gauff, who is currently ranked 11th in the world, is yet to win a Grand Slam title but reached the French Open Final in June.

“I’ve learned a lot from them [Serena and sister Venus],” Gauff continued.

“People always tell me that you’re going to be next whatever blah blah blah, and Serena has been considered the GOAT for at least the second half of her career and she never succumbed to that pressure.

“I think she overcame it and I think that’s something I take from her and try to learn from it.

“Not that I’m at her level and experiencing the same pressure she is, but in the moment I try to emulate that.”

Williams announced in an emotional article for Vogue yesterday that she would be “evolving away from tennis”.

Making it clear that she did not like the word “retirement”, the 40-year-old said she would be moving towards “other things that are important to me”.

Her transition from tennis is expected to begin after the US Open, which will be staged in New York from August 29th to September 11th.