In preparation for the Dubai Duty Free Men's Open, Andre Agassi and Roger Federer of Switzerland, couldn't resist the temptation to have a friendly “hit” on the world's most unique tennis court, the Helipad of the Burj Al Arab, the world's most luxurious hotel. Standing 321 metres high on a man made island, the majestic Burj Al Arab is without doubt the most recognizable hotel in the world. The hotel's helipad, which is situated 211 metres high covers a surface area of 415 square metres. The pictures were taken on February 22, 2005, in Dubai, United Arab Emirates. (Photo by Getty Images for Dubai Duty Free)

Students protest in red underwear on the Plein in The Hague, The Netherlands, 02 June 2021. The action is part of the #NietMijnSchuld campaign by Dutch union FNV Young & United and the National Student Union LSVb, which are campaigning for a debt-free basic grant. (Photo by Bart Maat/EPA/EFE)

A member of Team USA (L) recovers USA's Anita Alvarez (C), from the bottom of the pool during an incendent in the women's solo free artistic swimming finals, during the Budapest 2022 World Aquatics Championships at the Alfred Hajos Swimming Complex in Budapest on June 22, 2022. (Photo by Peter Kohalmi/AFP Photo)

An attendee dances at the start of the “Big Goth Dance Party” during the Porcupine Freedom Festival, or PorcFest, the Free State Project's annual summer gathering in Lancaster, NH on Wednesday, June 25, 2014. (Photo by Matthew Cavanaugh/The Washington Post)

Vegetarian 19-year-old model Courtney Stodden gets ready to serve veggie hot dogs wearing a lettuce bikini during a People for the Ethical Treatment of Animals (PETA) free veggie dog handout on Capitol Hill in Washington, DC, July 16, 2014. (Photo by Jim Watson/AFP Photo)

A Free Syrian Army (FSA) fighter reacts as he mourns near the body of his brother, who was an FSA fighter and died during an offensive against Islamic State fighters to take control of Qabasin town, on the outskirts of the northern Syrian town of al-Bab, Syria January 10, 2017. (Photo by Khalil Ashawi/Reuters)

The team from France performs their Free Routine during the Synchronized Swimming Olympic Games Qualification Tournament at the Maria Lenk Aquatics Center in Rio de Janeiro, Brazil on March 6, 2016. The tournament is also a test event for the Rio 2016 Olympics. (Photo by Sergio Moraes/Reuters)

Young children at a Bristol, Great Britain health centre unsure of the benefits of sun-lamps and the special glasses that must be worn, July 1948. The health centre was part of the newly introduced free National Health Service. (Photo by Popperfoto/Getty Images)