Pic: Roger Federer and Novak Djokovic look up, up and up some more to former NBA star Yao Ming

These pictures with Roger Federer and Novak Djokovic with Yao Ming gives you some indication as to just how tall the former basketball player is.

Federer is by no means a small man. He stands at six feet two inches tall, but in this picture, he looks like a child compared to the giant that is Yao Ming.

Hard not to look up to the great @YaoMing. Amazing athlete and national hero pic.twitter.com/iWvi4GrY0Z — Roger Federer (@rogerfederer) October 8, 2014

Djokovic is the same height as Federer and as you can see from the picture below, is some way below Ming.

I got to meet Yao Ming today. Very big guy ;) pic.twitter.com/rnCGm4Rp5k — Novak Djokovic (@DjokerNole) October 8, 2014

Ming, formerly of the Houston Rockets in the NBA, is seven foot six inches tall and won eight NBA All-Star awards during his time in the States. Federer and Djokovic are competing at the Shanghai Masters in China, which is where the pictures were taken.