Sexologist Chantelle Otten looks chic in trendy pants and a denim jacket as she leads arrivals at the Australian Open

Chantelle Otten put on a stylish display as she lead celebrity arrivals at day three of the Australian Open as a guest of fashion house Ralph Lauren.

The sexologist, 33, looked effortlessly chic as she arrived on Tuesday in white pants, a matching coloured top and oversized denim jacket.

She completed her ensemble with a pair of white strappy heels, a gold necklace and dark sunglasses.

Chantelle, who is dating Paralympian Dylan Alcott, left her dark tresses straight and added to her stunning features with a glamorous make-up palette.

Chantelle was joined at the event by Nick Kyrgios' girlfriend Costeen Hatzi.

Costeen flaunted her incredible figure as she arrived in a tiny white skirt and a striped buttoned shirt.

She accessorised her look with linen blazer and a pair of matching coloured shoes.

Costeen also wore a dark green cap and finished her ensemble with several gold bracelets and a black bag.

She styled her long brunette locks in waves and let her natural beauty shine with a subtle makeup palette.

 AFL WAG Jessie Murphy and her husband Marc put on a loved-up display as they attended the event together.

The blonde beauty showed off her endless pins in a tiny white dress and dark navy blazer.

Jessie accessorised with a pair of white stilettos, gold earrings and a baby blue bag.

The WAG opted for a full-coverage base of makeup which she topped with a nude lip and several layers of mascara.

Marc also looked dapper in black pants, white sneakers and a buttoned shirt.

The couple married in December 2016 and are parents to son Max, five, and daughter Imogen, two.

They tied the knot at the Luminare venue in South Melbourne.

The guest list included a Who's Who of Melbourne's social scene, including 'queen bee' footy WAG Rebecca.

The Murphys are believed to have started dating in 2011.