US Open: Naomi Watts waves an Australian flag and cheers on Nick Kyrgios

Naomi Watts was glowing as she cheered from the sideline during Aussie tennis star Nick Kyrgios’ showdown at the US Open on Tuesday night.

The actress, 53, wore a gorgeous blue long-sleeved frock printed with flowers while sitting with a friend at the epic tennis match.

She accessorised with gold rimmed aviator glasses and styled her short blonde hair with a natural wave.

Naomi Watts was glowing as she cheered from the sideline during Aussie tennis star Nick Kyrgios’ showdown at the US Open on Tuesday night

Watts was the ultimate super fan at the event, which was held at the USTA Billie Jean King National Tennis Center in New York City.

She was pictured multiple times raising her fists in the air when Kyrgios earned a point and also waved a small Australian flag in support.

Occasionally, the award-winning star would stand up out of her chair to applaud the 27-year-old tennis player.

As the lengthy match progressed and Kyrgios fell behind, Watts appeared to lose hope in the world number 23 reaching a spot in the final.

The actress, 53, wore a gorgeous blue long-sleeved frock printed with flowers while sitting with a friend at the epic tennis match

The actress, 53, wore a gorgeous blue long-sleeved frock printed with flowers while sitting with a friend at the epic tennis match

She was pictured multiple times raising her fists in the air when Kyrgios earned a point and also waved a small Australian flag in support

She was pictured multiple times raising her fists in the air when Kyrgios earned a point and also waved a small Australian flag in support

Watts currently resides in New York City, where she continues to co-parent her two children, Sasha and Kai, with ex Liev Schreiber.

The family are often seen together during outings while the friendly exes have moved on with new love interests.

Watts is currently in a relationship with 53-year-old Billy Crudup and have been going strong since 2017.

Nick Kyrgios is out the US Open after a defeat in five sets against Karen Khachanov

Nick Kyrgios is out the US Open after a defeat in five sets against Karen Khachanov

Moments after his defeat, Kyrgios shook hand with Khachanov and smashed his racket up

Moments after his defeat, Kyrgios shook hand with Khachanov and smashed his racket up

Occasionally, Watts would stand up out of her chair to applaud the 27-year-old tennis player

Occasionally, Watts would stand up out of her chair to applaud the 27-year-old tennis player

Meanwhile, Schreiber, 54, has a much younger girlfriend named Taylor Neisen, 29. 

Kyrgios went out of the US Open with less of a bang and more of a whimper as he succumbed to the brutish power of Karen Khachanov.

The Australian will now get the journey home he has spoken longingly of after going down 7-5 4-6 7-5 6-7 6-4 in three hours and 39 minutes with the time dead on 1am.

Initially troubled by a knee issue – and perhaps ruing the decision to play doubles here – he never quite ignited and sometimes looked subdued in a match dominated by serve that saw 61 aces almost evenly split.

As the lengthy match progressed, and Kyrgios fell behind, Watts appeared to lose hope in the world number 23 reaching a spot in the final

She looked disheartened for Kyrgios, who initially struggled with a knee issue during the match

As the lengthy match progressed, and Kyrgios fell behind, Watts appeared to lose hope in the world number 23 reaching a spot in the final

Watts currently resides in New York City, where she continues to co-parent her two children, Sasha and Kai, with ex Liev Schreiber

Watts currently resides in New York City, where she continues to co-parent her two children, Sasha and Kai, with ex Liev Schreiber

It has been a transformational summer for Kyrgios, but this was a deflating ending, despite him battling to the end when previously he might have folded. 

With no previous champion in the field it was an excellent opportunity for him to join the ranks of Australian Major winners.

Instead the strapping and slightly mechanical Khachanov, who held his concentration admirably, will now face Norway’s Casper Ruud for a place in the final.

Kyrgios moves with a strange gait at the best of times but there was something definitely less animated about him as the first set rattled away at lightning pace.

It was a gripping match on Arther Ashe, with Khachanov emerging victorious after five sets

It was a gripping match on Arther Ashe, with Khachanov emerging victorious after five sets

Amid a flurry of aces from both men, the first eleven games took just half and hour, before a tight twelfth that saw Kyrgios leave the door ajar for the Russian to get a foot in it.

Then came the call for the trainer, who entered the court to frantically massage what initially looked like either side of the Australian’s left knee.

‘I don’t want to play through this s**t,’ he told his support box in the corner – before promptly playing on and breaking Khachanov in the third game.

But Kyrgios went the distance in a five-set thriller on Arthur Ashe that went deep into the night

But Kyrgios went the distance in a five-set thriller on Arthur Ashe that went deep into the night

Yet it was Khachanov who emerged victorious and he now heads into the semifinal

Yet it was Khachanov who emerged victorious and he now heads into the semifinal 

Khachanov celebrates after finally winning the match dead on 1am in New York

Khachanov celebrates after finally winning the match dead on 1am in New York

He slowly gained the ascendancy and restricted himself to chuntering at the change of ends of what was, in truth, and often uninspiring contest.

His temper snapped when he missed a second break point at 4-4 in the third, hurling his racket away in disgust and screaming some very audible obscenities which umpire James Keothavong chose to ignore. 

He eventually dispensed an unsportsmanlike conduct violation for throwing a water bottle.

Kyrgios needed to save two set points in the next game, one of which came from a badly miscued Khachanov forehand as he rushed into the net.

The Russian did not make the same mistake when another two presented themselves in the next game, staying in the rally and winning it when Kyrgios netted a backhand.

Kyrgios' temper snapped when he missed a second break point at 4-4 in the third, hurling his racket away in disgust and screaming some very audible obscenities which umpire James Keothavong chose to ignore

Kyrgios’ temper snapped when he missed a second break point at 4-4 in the third, hurling his racket away in disgust and screaming some very audible obscenities which umpire James Keothavong chose to ignore

With the clock ticking towards midnight the Australian went up a break, only to immediately hand it back with a loose serve game to his dourly determined opponent.

An increasingly boorish crowd – which earlier on had included one man getting a haircut – roared him towards the tiebreak, in which he was always in charge, taking it 7-3.

While the knee looked to have ceased to be an issue, he got off to a poor start in the decider when he was broken, and was left regretting taking only two of nine break points. 

As a final act, he furiously smashed two of his rackets into the court after shaking hands. 

The crowd helped encourage Kyrgios back into the match but a victory evaded him

The crowd helped encourage Kyrgios back into the match but a victory evaded him

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