Katie Boulter reveals the surprising way she knew she was in love with her Aussie tennis star boyfriend Alex De Minaur - as couple tell all about their romance

British tennis star Katie Boulter has revealed the moment she knew Alex De Minaur was the man of her dreams - and it took her a surprisingly short amount of time.

Often labelled world tennis' power couple, the lovebirds recently celebrated their fourth anniversary - and Boulter couldn't be happier.

And it all took was a cup of coffee together for the world number 32 to realise the hardworking Aussie was definitely a keeper. 

'We bumped into each other at six in the morning and ended up getting a coffee. From that moment, I knew I was in it for the long haul,' Boulter told The Age.

'Growing up, I was always super-close to my grandpa: I always said to myself that if I can find someone who has half his heart, I'll be the luckiest woman in the world. I've found that person in Alex. 

'He puts me before himself all the time and takes care of the people around him – his family and his team. He's my best example of what I want to be.'

Both athletes are hoping to leave a mark at Wimbledon come July 1 - and De Minaur will be one of the men's top 10 seeds at the All England Club.

He was equally gushing about Boulter, stating it is 'just a joy to be around her' and he deeply admires her upbeat nature.

On Wednesday, the world number nine was named among a nine-strong Australian contingent to compete at the Paris Olympics from July 27.

De Minaur will play both singles and doubles on clay, in what will be his Olympic debut three years in the making.

In 2021, 'Demon' was ruled out on the eve of the Tokyo Games when he contracted Covid-19.

'I have always wanted to be an Olympian,' De Minaur said.

'Last time round I got a little bit unlucky to not be able to play in Tokyo, but I've had my eyes set on Paris and I am super excited to now be officially part of this team.

'I am really looking forward to just immersing myself in what it means to be an Olympian.

'I am excited see all the other sports, meeting some of my fellow athletes and making some new friends.'