Mike Hewitt, Dubai Duty Free / Getty Images
Helipad of the Burj Al Arab
In preparation for the Dubai Duty Free Men's Open, tennis legend Andre Agassi and Roger Federer, the Swiss tennis professional who's ranked No. 1 in the world, couldn't resist the temptation to have a friendly knock-about on the world's highest tennis court -- the helipad of Burj Al Arab hotel.