They are both head and shoulders above their rivals, but who can jump the highest?
Cristiano Ronaldo and tennis legend Novak Djokovic were filmed having a friendly contest in a Dubai gym.
Ronaldo, the Portuguese superstar who played for Juventus in the Italian Super Cup in Saudi Arabia last week, was teaching his friend Djokovic how to leap and head the ball.
“Teaching Novak Djokovic how to jump! Was a pleasure to see you and train with you my friend!!” Ronaldo said in an Instagram post.
Ronaldo has been shortlisted for the Dubai Globe Soccer Awards, which will be held along side the 14th Dubai International Sports Conference.
Ronaldo has found his scoring touch for Juventus and netted with an amazing header to secure a 2-1 victory for Juventus at Sampdoria.
He was also among the Juve stars playing in the Italian Super Cup to wear the first ever football shirt to feature traditional Arabic calligraphy.
Djokovic took part in the Mubadala World Tennis Championship in Abu Dhabi recently as he started his preparation for the Australia Open in January.
What is graphene?
Graphene is a single layer of carbon atoms arranged like honeycomb.
It was discovered in 2004, when Russian-born Manchester scientists Andrei Geim and Kostya Novoselov were "playing about" with sticky tape and graphite - the material used as "lead" in pencils.
Placing the tape on the graphite and peeling it, they managed to rip off thin flakes of carbon. In the beginning they got flakes consisting of many layers of graphene. But as they repeated the process many times, the flakes got thinner.
By separating the graphite fragments repeatedly, they managed to create flakes that were just one atom thick. Their experiment had led to graphene being isolated for the very first time.
At the time, many believed it was impossible for such thin crystalline materials to be stable. But examined under a microscope, the material remained stable, and when tested was found to have incredible properties.
It is many times times stronger than steel, yet incredibly lightweight and flexible. It is electrically and thermally conductive but also transparent. The world's first 2D material, it is one million times thinner than the diameter of a single human hair.
But the 'sticky tape' method would not work on an industrial scale. Since then, scientists have been working on manufacturing graphene, to make use of its incredible properties.
In 2010, Geim and Novoselov were awarded the Nobel Prize for Physics. Their discovery meant physicists could study a new class of two-dimensional materials with unique properties.
Cultural fiesta
What: The Al Burda Festival
When: November 14 (from 10am)
Where: Warehouse421, Abu Dhabi
The Al Burda Festival is a celebration of Islamic art and culture, featuring talks, performances and exhibitions. Organised by the Ministry of Culture and Knowledge Development, this one-day event opens with a session on the future of Islamic art. With this in mind, it is followed by a number of workshops and “masterclass” sessions in everything from calligraphy and typography to geometry and the origins of Islamic design. There will also be discussions on subjects including ‘Who is the Audience for Islamic Art?’ and ‘New Markets for Islamic Design.’ A live performance from Kuwaiti guitarist Yousif Yaseen should be one of the highlights of the day.
