With coaching from 2009 #USOpen champion @delpotrojuan, @Nasa astronaut @Astro_Feustel will take on his fellow crewmates aboard the @Space_Station in the first ever tennis match in space on Aug. 21! Don’t miss their call live at 12:35p ET and his match at 8:30pm live on our Twitter, Facebook, and Youtube. #TMinusNetGeneration #USOpen #USOpen50 #NetGeneration #NetGenNetSet #NASA #space #astronaut #delpotro