Have you ever wondered if you could return a pro's serve, or boasted to your friends that you can? Well, the ITA is here to let you know exactly how much time you'd have to react.

Dominic Inglot was the test subject to figure out how many seconds his opponents have when they're staring down his serve. Across four serves, he averaged 0.5 seconds. That's barely enough time to get a racquet back.

Inglot, a 34-year-old Brit, won his 14th career title in New York and finished the season ranked No. 60.