Karl Stefanovic works up a sweat during tennis match in Sydney

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He has been taking private tennis lessons for years.

And today host Karl Stefanovic, 48, showed off his racket skills in yet another grueling session with his personal tennis trainer on Monday.

The Nine presenter worked up a sweat as he ran around the outside lane, regularly wiping away the sweat with his top.

Karl Stefanovic showed off his tennis skills during a private coaching session in Sydney on Monday

Karl Stefanovic showed off his tennis skills during a private coaching session in Sydney on Monday

The Nine presenter worked up a sweat as he ran around the outside lane, regularly wiping away the sweat with his top

The Nine presenter worked up a sweat as he ran around the outside lane, regularly wiping away the sweat with his top

Karl was dressed for action, wearing a gray shirt, black shorts and a pair of black sneakers.

He completed his look with black crew socks and a gray baseball cap emblazoned with the Chicago Bulls logo.

Sometimes, Karl also showed glimpses of his tattoo collection by rolling up his sleeves, including the Japanese symbols he had applied to his shoulder when he was stoned in college.

Sometimes, Karl also showed glimpses of his tattoo collection by rolling up his sleeves, including the Japanese symbols he had applied to his shoulder when he was stoned in college.

Sometimes, Karl also showed glimpses of his tattoo collection by rolling up his sleeves, including the Japanese symbols he had applied to his shoulder when he was stoned in college.

Karl was dressed for action, wearing a gray shirt, black shorts and a pair of black sneakers

Karl was dressed for action, wearing a gray shirt, black shorts and a pair of black sneakers

He completed his look with black crew socks and a gray baseball cap emblazoned with the Chicago Bulls logo

He completed his look with black crew socks and a gray baseball cap emblazoned with the Chicago Bulls logo

Karl has only spoken to the media briefly about this tattoo, the Announce sun in 2014 that he has no idea what the Japanese writing on his arm means, admitting, “I don’t know what it means because I was stoned in college when I pulled it off.”

On his other shoulder, the Nine presenter revealed what appeared to be a series of runes, which he previously confirmed are “good luck symbols for the children.”

During the match, Karl was seen jumping in the air and returning several tricky serves from across the field.

Karl has only spoken to the media briefly about this tattoo.  He told the Herald Sun in 2014 that he has no idea what the Japanese writing on his arm means, admitting,

Karl has only spoken to the media briefly about this tattoo. He told the Herald Sun in 2014 that he has no idea what the Japanese writing on his arm means, admitting, “I don’t know what it means because I was stoned in college. when I got it done’

On his other shoulder, the Nine presenter revealed what appeared to be a series of runes, which he previously confirmed are

On his other shoulder, the Nine presenter revealed what appeared to be a series of runes, which he previously confirmed are

On his other shoulder, the Nine presenter revealed what appeared to be a series of runes, which he previously confirmed are “good luck symbols for the children.”

He seemed visibly puffed up by the ordeal at times, pausing to catch his breath as he rested his hands on his hips.

Elsewhere on Monday, Karl was spotted moving into his newly purchased home.

Photos show the reporter carrying a collection of rare, autographed cricket bats into the garage.

During the match, Karl was seen jumping in the air and returning several tricky serves from across the pitch

During the match, Karl was seen jumping in the air and returning several tricky serves from across the pitch

He seemed visibly puffed up by the ordeal at times, pausing to catch his breath as he rested his hands on his hips.

He seemed visibly puffed up by the ordeal at times, pausing to catch his breath as he rested his hands on his hips.

Karl, who has been taking private tennis lessons for years, watched the court at home as he expertly swung the ball over the net

Karl, who has been taking private tennis lessons for years, watched the court at home as he expertly swung the ball over the net

Karl put all his energy into hitting the ball and seemed laser focused on winning every rally

Karl put all his energy into hitting the ball and seemed laser focused on winning every rally

He was also seen maneuvering a Pac Man arcade machine, which sells for between $700 and $1000, into space.

Karl moves into the house with wife Jasmine and daughter Harper, two.

Last week, Karl and his wife Jasmine listed their four-bedroom Castlecrag home for rent for $1,850 per week.

Elsewhere on Monday, Karl was spotted moving into his newly purchased home

Elsewhere on Monday, Karl was spotted moving into his newly purchased home

Photos show the reporter carrying a collection of rare, autographed cricket bats into the garage

Photos show the reporter carrying a collection of rare, autographed cricket bats into the garage

Karl moves into the house with wife Jasmine and daughter Harper, two

Karl moves into the house with wife Jasmine and daughter Harper, two

Last week, Karl and his wife Jasmine listed their four-bedroom Castlecrag home for rent for $1850 a week

Last week, Karl and his wife Jasmine listed their four-bedroom Castlecrag home for rent for $1850 a week

It was snapped up after just five days on the market, significantly less than the area’s average 32 days. The couple bought the house for $3.2 million last year.

The Channel Nine star has three older children with his ex-wife Cassandra Thorburn: sons River, 15, and Jackson, 22, and daughter Willow, 16.

A few months after his divorce from Cassandra in 2016, Karl met Jasmine, a model and shoe designer, at a boat party in Sydney.

The Stefanovics got married in December 2018 at the One&Only Palmilla resort in Los Cabos, Mexico.

The Channel Nine star has three older children with his ex-wife Cassandra Thorburn: sons River, 15, and Jackson, 22, and daughter Willow, 16

The Channel Nine star has three older children with his ex-wife Cassandra Thorburn: sons River, 15, and Jackson, 22, and daughter Willow, 16

A few months after his divorce from Cassandra in 2016, Karl met Jasmine, turned model and shoe designer, at a boat party in Sydney

A few months after his divorce from Cassandra in 2016, Karl met Jasmine, turned model and shoe designer, at a boat party in Sydney

The Stefanovics got married in December 2018 at the One&Only Palmilla resort in Los Cabos, Mexico.

The Stefanovics got married in December 2018 at the One&Only Palmilla resort in Los Cabos, Mexico.