



With the birth of his second set of twins on Tuesday, it's been a busy week for Roger Federer. But the 32-year-old father of four and 17-time Grand Slam champion still made time for some hard-core practice on the red clay in Zurich with one of the rising stars of the ATP Tour this week, as this Instagram vid, posted by 19-year-old Nick Kyrgios proves.



It's Two Boys!!! Mirka Federer Gives Birth to Second Set of Twins



Squint your eyes to bring the grainy video into focus and one can catch a glimpse of the no doubt sleep-deprived Federer taking reps with his one-hander while Kyrgios hits a few volleys.



Kyrgios, the only teenager in the top 200 at No. 159 in the world, was pretty damn thrilled to have the opportunity. He sent out the following enthusiastic tweet on Thursday evening:



Ok guys, the cats out of the bag. I've had a great few days hitting with the king of tennis @rogerfederer & loved every minute #Learning — Nicholas Kyrgios (@NickKyrgios) May 8, 2014



It still remains unclear whether or not Federer will attend next week's Rome Masters, but judging from the surface he chose to practice on with Kyrgios, the French Open is a certainty.



This reply to Kyrgios' tweet pretty much sums up what we were thinking: