Nick Kyrgios is every inch the doting boyfriend during sweat session with girlfriend Costeen Hatzi

Nick Kyrgios proved he is the loving partner of girlfriend Costeen Hatzi on Sunday as he helped cheer her on at the gym.

The Bondi Sands ambassador, 23, shared a very sweet video on her Instagram Stories in which the tennis star, 28, coached her through a series of pull-ups.

The footage showed the athlete lifting his lover so she could reach the bar before offering words of encouragement.

He began helping Costeen support her leg in a resistance band to make the exercise easier, before grabbing her waist to lift her to the bar.

Nick then began offering words of encouragement as he led his partner through three pull-ups.

Nick Kyrgios, 28, (left) proved he is the loving partner of girlfriend Costeen Hatzi, 23, (right) on Sunday when he helped cheer her on at the gym

‘There you go. There’s one. Come on. Take three, take three. Come on. Another. You are good. You are good. Well done,” he said as she finished her set.

Quickly with a helping hand, Nick then prevented Costeen from getting tangled in the resistance band as she fell back to the ground.

Costeen captioned the heartwarming video with, “Supportive friend at the gym hahaha.”

The Bondi Sands ambassador shared a very sweet video to her Instagram Stories of the tennis star coaching her through a series of pull-ups

The footage showed the athlete lifting his lover so she could reach the bar before offering words of encouragement

The Bondi Sands ambassador shared a very sweet video to her Instagram Stories of the tennis star coaching her through a series of pull-ups

It comes after Costeen opened up about her relationship with Nick in a new interview The Daily Telegraph earlier this year.

The brunette beauty shared that the pair have been inseparable since their first date in December 2021 and have already discussed wedding and pregnancy plans.

“We’ve definitely had conversations… we love each other, and there’s no rush. It will happen when it happens. Nick tells me every day he wants a baby,” she revealed.

Costeen recently revealed that she and Nick have been inseparable since their first date in December 2021 and have already discussed wedding and pregnancy plans

Costeen recently revealed that she and Nick have been inseparable since their first date in December 2021 and have already discussed wedding and pregnancy plans

Costeen revealed the pair were dating via Instagram direct messages (DMs) when the tennis champion asked if she wanted to buy a mirror from her small business.

Nick then sent a message to his loved one’s personal page and invited her to dinner.

Costeen also admitted that she likes being branded as a “WAG,” an acronym for the “wives and girlfriends” of athletes.

“I like the term WAG…I don’t know why there’s a negative connotation to it; “I don’t know where they come from,” she said.