Kai Havertz and his bikini clad girlfriend Sophia Weber enjoy the

Kai Havertz and his bikini-clad girlfriend Sophia Weber enjoy the sun on a boat trip in St. Tropez

Kai Havertz and his girlfriend Sophia Weber looked on cloud nine when they enjoyed a boat trip on vacation in St. Tropez on Monday.

The Chelsea footballer, 23, was making the most of his free time as he whisked his girlfriend away on the romantic trip to the south of France.

Sophia looked nothing short of sensational as she showed off her incredible figure in a light blue bikini while working on her tan.

Couple: Kai Havertz and his girlfriend Sophia Weber (pictured) were on cloud nine as they enjoyed a boat trip while on holiday in St Tropez on Monday

Couple: Kai Havertz and his girlfriend Sophia Weber (pictured) were on cloud nine as they enjoyed a boat trip while on holiday in St Tropez on Monday

The 22-year-old let her brunette tresses fall loosely over her shoulders for the outing, while also wearing a white necklace.

Sophia was joined by a friend during the boat ride as the couple laughed and joked on deck.

The beauty, who has over 150,000 followers on Instagram, also wore glasses while taking a dip.

Kai showed off his toned physique as he wore a pair of light blue shorts on the trip.

Holiday: The Chelsea footballer, 23, was making the most of his free time as he whisked his girlfriend away on the romantic trip to the south of France Relaxation: Kai showed off his toned physique as he wore a pair of light blue shorts on the trip

Holiday: The Chelsea footballer, 23, was making the most of his free time as he whisked his girlfriend away on the romantic trip to the south of France

Fun in the sun: Sophia was joined by a friend during the boat trip as the couple laughed and joked on deck

Fun in the sun: Sophia was joined by a friend during the boat trip as the couple laughed and joked on deck

Stunning: Sophia looked nothing short of sensational as she showed off her incredible figure in a light blue bikini while working on her tan

Stunning: Sophia looked nothing short of sensational as she showed off her incredible figure in a light blue bikini while working on her tan

The German-born footballer looked in good spirits as he appeared to play with Sophie while they chatted with friends.

The couple occasionally share snaps on social media, and Kai wished Sophia a happy birthday in March.

It comes after Kai reflected on how he scored his winning goal for Chelsea against Manchester City in the Champions League.

Speaking to the D, he said: “The goal changed everything.

Radiant: The 22-year-old let her brunette locks fall loosely over her shoulders for the outing Dive: She also wore a white necklace

Radiant: The 22-year-old let her brunette locks fall loosely over her shoulders for the outing

Relationship: Sophia has occasionally shared beloved snaps on her Instagram alongside her boyfriend Kai

Relationship: Sophia has occasionally shared beloved snaps on her Instagram alongside her boyfriend Kai

Playful: The German-born footballer looked in good spirits as he appeared to play with Sophie while they chatted with friends

Playful: The German-born footballer looked in good spirits as he appeared to play with Sophie while they chatted with friends

Pose: Kai perched on the roof of the boat as he snapped a photo of Sophie and her pal

Pose: Kai perched on the roof of the boat as he snapped a photo of Sophie and her pal

History: Kai and Sophie are regarded as childhood sweethearts

History: Kai and Sophie are regarded as childhood sweethearts

Travel: The couple occasionally share snaps on social media, with Kai wishing Sophia a happy birthday in March

Travel: The couple occasionally share snaps on social media, with Kai wishing Sophia a happy birthday in March

“If I hadn’t scored that goal, everyone would say it was a first-season disaster for me. I wouldn’t have said that myself because I knew I was only 20, almost 21 when I came here and it’s not easy at that age. It may take me a year, two or three years to get used to this league, to this club, to this new lifestyle, and that goal helped me a lot.

“Two seconds in a year might have changed the whole year for me. Little things can turn everything around.”

Overnight Kai became Porto’s hero and not just another expensive striker signed for £71m from Bayer Leverkusen and failed in the Premier League.

He volunteers this example as encouragement and support for Romelu Lukaku, who is currently going through a similar experience and is finding it difficult to make an impact after a £97.5million move from Inter Milan.

Performance: It comes after Kai reflected on how he scored his winning goal for Chelsea against Manchester City in the Champions League

Performance: It comes after Kai reflected on how he scored his winning goal for Chelsea against Manchester City in the Champions League

Interview: Speaking to the Daily Mail, he said: 'The goal changed everything'

Interview: Speaking to the D, he said: ‘The goal changed everything’

He said:

He said: “If I hadn’t scored that goal, everyone would say it was a disaster in my first season.”

Kai added:

Kai added: “I wouldn’t have said that myself because I knew I was only 20, almost 21 when I came here and it’s not easy at that age.”

He said: Hero: Overnight Kai became Porto's hero and not just another expensive striker signed for £71m from Bayer Leverkusen and failed in the Premier League

He said: “It may take a year, two or three years to get used to this league, this club and this new lifestyle and that goal helped me a lot.”

Career: Kai made 45 appearances in his first season at Chelsea, scoring nine goals and providing nine assists

Career: Kai made 45 appearances in his first season at Chelsea, scoring nine goals and providing nine assists

He said: “I know that feeling. When you walk into a club with a £100m package and everyone wants you to play in a game from start to finish. It’s not easy to go into a game and score two or three goals.

“We’re all human, everyone makes mistakes, but other than that I think we’re a little too hard on Rome. You have to remember that he scored goals in the semifinals and final of the World Cup that were huge for us.

“Even if everyone says ‘he doesn’t score, he doesn’t score’, he still has the most goals in our squad. It’s not that bad, but everyone’s always putting pressure on the big players, players who cost a lot of money.”

Kai made 45 appearances in his first season at Chelsea, scoring nine goals and providing nine assists.

Beginnings: Kai graduated from the youth department of Bayer Leverkusen in 2016

Beginnings: Kai graduated from the youth department of Bayer Leverkusen in 2016

Deal: Kai has been signed at Chelsea on a £84m (£72m) transfer.

Deal: Kai has been signed at Chelsea on a €84m (£72m) transfer

Childhood: Kai started playing football at the age of four when he joined amateur club Alemannia Mariadorf, where his grandfather was chairman

Childhood: Kai started playing football at the age of four when he joined amateur club Alemannia Mariadorf, where his grandfather was chairman