Nick Kyrgios' girlfriend Costeen Hatzi watches his first match at the ...

Nick Kyrgios' girlfriend Costeen Hatzi watches his first match at the ...
Nick Kyrgios' girlfriend Costeen Hatzi watches his first match at the ...
Nick Kyrgios' glamorous new girlfriend Costeen Hatzi proudly watches on as her tennis pro beau plays his first match at the Australian Open

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Nick Kyrgios only went Instagram official with his glamorous new girlfriend Costeen Hatzi last month.

And on Tuesday, the stunning influencer showed just how serious the duo are, as she proudly sat in the crowd to cheer him on during his first Australian Open match against UK star Liam Broady.

The 21-year-old was spotted in the stalls next to a male pal as she applauded her boyfriend, 26, who was playing an always-exciting game just metres away.

Love match: On Tuesday, Costeen Hatzi was spotted standing in the Australian Open crowd with a male pal as she watched Nick Kyrgios play his first match against UK player Liam Broady

Love match: On Tuesday, Costeen Hatzi was spotted standing in the Australian Open crowd with a male pal as she watched Nick Kyrgios play his first match against UK player Liam Broady

Costeen looked absolutely stunning for the outing, wearing a white linen crop-top and trousers.

She wore lashings of makeup on her striking features, including thick eyelashes and a peach lip-gloss.

Costeen wore her luscious brunette locks in a poker-straight style, and accessorised with bracelets and a necklace. 

Stunner: Costeen looked absolutely beautiful for the outing, wearing a white linen crop-top and trousers

Stunner: Costeen looked absolutely beautiful for the outing, wearing a white linen crop-top and trousers 

Beauty: She wore lashings of makeup on her striking features, including thick eyelashes and a peach lip-gloss

Beauty: She wore lashings of makeup on her striking features, including thick eyelashes and a peach lip-gloss 

Nick certainly made quite an impact during the match, declaring 'I'm back' and 'this is my house' to his shell shocked opponent. 

It comes after Nick went Instagram official with Costeen last month, sharing a photo on his grid of the couple cuddled up together.

Nick also shared more photos

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