Tennis court in Dubai that will be underwater

While the innovative idea drew much interest from potential spectators, it also raised many technical concerns for engineers and developers. Sara Fray, Director of Engineering and Technical Services at the Institution of Structural Engineers in London, reportedly pointed out to MailOnline that the transparent ceiling would require a continuous pane of glass measuring at least 108 feet-wide and weigh “possibly a hundred tons” to accommodate the court and spectators.