It's a ROYAL knock-out! Princess Eugenie looks tense as Nelson Mandela's grandson clashes with US environmentalist in charity boxing match - and ends up in an ambulance

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Princess Eugenie looked understandably tense as she watched a lively charity boxing match which ended up with Nelson Mandela's grandson going off in an ambulance.

The 27-year-old royal sported a stunning black sleeveless gown as she witnessed the blows raining down at The Charge II boxing fundraiser at Lindley Hall, London, last night. 

Kweku Mandela put on a strong performance against U.S. environmentalist Ben Bronfman, but came out worse off when he had to leave the ring with an injured shoulder. 

Eugenie sported a stunning black sleeveless gown as she witnessed the blows raining down at The Charge II boxing fundraiser at Lindley Hall, London, last night

Kweku Mandela put on a strong performance against U.S. environmentalist Ben Bronfman, but came out worse off when he had to leave the ring with an injured shoulder at the event in London

Kweku was seen in obvious discomfort as he was wheeled away by medics following the lively bout

Love Island's Camilla Thurlow also attended the Charge II event, posing with co-star Jamie Jewitt, as did football pundit Jamie Redknapp

Luxury property developer Nick Candy, husband of singer Holly Valance, was pictured greeting Princess Eugenie

Kweku was seen in obvious discomfort as he was wheeled away by medics following the bout. 

Eugenie added a touch of glamour to the proceedings that were in aid of the fight against African elephant and rhino poaching.

The Queen's granddaughter attended the event to support the protection of wildlife alongside famous names like Trudie Styler, Zac Goldsmith, and cricketer Kevin Pietersen among others. 

The star-studded event was hosted by The Charge II ambassador and boxing champion Wladimir Klitschko.

Guests at the event, which was sponsored by London's luxury restaurant Annabels, were treated to several boxing matches in a bid to raise funds. 

The bout between Kweku Mandela and Ben Bronfman was undoubtedly one of the star events of the night. 

The legendary politician's grandson is a film producer with a series of titles under his belt, including Inescapable, Mandela's Children and The Bang Bang Club. 

He is also a keen campaigner and founded the non-profit organisation Africa Rising in 2009 to aid the development of the continent.  

Klitschko visits Kweku in an ambulance after he received a hefty blow to his shoulder during the bout

Princess Eugenie with Astrid Harbord,(left) and Klitschko posing next to a boxing gown at The Charge II boxing fundraiser in London last night

Kweku(seen on the right during the bout) is a film producer with a series of titles under his belt, including Inescapable, Mandela's Children and The Bang Bang Club

Ben Bronfman(seen celebrating after the result was announced) invests in green energy and is a former guitarist for Indie band The Exit, when he went by the stage name Ben Brewer

Kweku put on a brave display after receiving a hit to his shoulder at the charity event last night, which was in aid of Charge II

The star-studded event was hosted by The Charge II ambassador and boxing champion Wladimir Klitschko

Ben Bronfman looked the part as he strode up to the ring wearing a white gown before his clash with Kweku Mandela

Ben Bronfman invests in green energy development and is a former guitarist for Indie band The Exit, when he went by the stage name Ben Brewer. 

Twice world heavyweight champion Klitschko auctioned off several lots including the robe he wore to his last ever fight against Anthony Joshua.

Inside the robe is a mysterious USB stick which the boxer said contains his prediction of the outcome and only the winning bidder will find out. 

Charge II will plough all the proceeds from the event into funding ground patrols to protect endangered animals in Africa, including elephants and rhinos. 

Olivia Grant and Caroline Rupert were also present at the star-studded event, sponsored by Annabel's nightclub

Boxer Chris Eubank junior also attended The Charge II charity match but did not take part in the ring

Retired Chelsea star Andriy Shevchenko posed for a photo before the bouts began, as did Guy Pelly, a close friend of Princes William and Harry

Game of Thrones star Staz Nair was also in attendance at the event, as was Prince Harry's former girlfriend Astrid Harbord

Worthy casuse: The Charge II is a charity that fights against the poaching of elephants and rhinos in Africa which is rife, and tonight's event was attended by a host of stars

Eugenie was all smiles as she left the event later in the evening, wrapping up against the cold chill in a black coat

The Princess navigated the pavement after stepping out of the car, she used her hand for balance as she walked in black stilettoes

Eugenie was all smiles as she left the event later in the evening, wrapping up against the cold chill in a black coat.

She tucked her hair behind her ears as she stepped out of the car, navigating the pavement in a pair of black stilettoes. 

Eugenie, the second and youngest daughter of Prince Andrew and Sarah Ferguson, studied at Marlborough College, scooping three A's and a B before studying at Newcastle university.

After graduating she worked in New York for the online auction house Paddle8 before moving back to the UK two years ago to join the Hauser & Wirth contemporary art gallery in London where she was promoted to director earlier this year.

She has repeatedly been forced to deny rumours an engagement is on the cards for her and nightclub boss Jack, who have been together for seven years.