Serena Williams looked sensational as she stepped out in New York on Wednesday.

The tennis pro paid a visit to the BussFeed offices in a stylish shirt dress with cute heart print and glossy red heels.

The leggy look flashed a lot of thigh and the athlete even gave onlookers a glimpse of her underwear as the lower buttons on her dress popped open.

Leggy look: Serena Williams looked simply stylish in a striped shirt dress in New York but suffered a wardrobe malfunction as some buttons came undone

Serena’s look was complete with a heart pendant around her neck and her sleek caramel locks styled into glam waves.

Meanwhile, Serena has revealed she has never spent a ‘day apart’ from her daughter.

The 37-year-old tennis star has 19-month-old Olympia with husband Alexis Ohanian and though she admitted it is ‘not easy’ to juggle her busy schedule, she won’t compromise time with her little girl.

Sunny outing: The mother-of-one visited the BuzzFeed offices in New York

Oops! Serena, 37, accidentally flashed her underwear as her dress opened up while she walked

She told People magazine: ‘I’m a super hands-on mom. I am with her every day since she was born. We haven’t spent a day apart.

‘Despite my best efforts to be like, ‘Oh, I’ll take her with me’ … It’s been really trying. This is a whole new territory for me.

‘It’s definitely not easy, and I’m juggling more than I’m used to. I think the most crazy part is now I’m adding ‘mom’ to that, and that has been really hard.’

Serena has learned a lot about children thanks to her daughter and is bracing herself for Olympia hitting the ‘terrible twos’.

Red hot: The tennis ace wore a heart print dress with matching red heels

She looks good and she knows it: Serena didn’t appear to notice or mind that she was flashing a thigh-ful

She said: ‘My mom just told me that [Olympia] is gonna be in a ‘Terrible Two’ phase and she’s like, ‘It’s gonna be fun for you’ and I’m like, ‘Oh my God, what does that mean?’

‘[Olympia] isn’t quite there yet, but she definitely falls on the floor and has fits and she doesn’t understand. I’m learning a lot about kids and it’s really amazing.’

But even if her daughter does go through a phase of tantrums, Serena will ‘feel sorry’ for the tot rather than get angry