When the ancient Greeks held the first Olympics, do you think they realized that thousands of years later, people would be utilizing modern computer technology to digitally alter footage to make it look like athletes were playing tennis on top of a volcano? No, probably not, because they didn't know what words like "computer," and "tennis," and "volcano" were. Don't be an idiot.

Great Britain's Andy Murray and Argentina's Juan Martin Del Potro faced off in a four-hour tennis match for the ages last night, but not before imgur user factionman realized they were playing on a giant green screen, and digitally dropped the players into some sticky situations:

Our video director Miriam Nielsen revealed that we could learn to do this with iMovie, Premiere, even Windows Movie Maker. "Basically any video editor nowadays will let you key out a certain color and then you just drop in whatever background you need," she said.

If you want to try your hand at making your own post-apocalyptic tennis match, here's a handy explainer on how to use the green screen option in iMovie!