@ryan.harrison92 and @jack.sock put #TeamUSATennis into the @daviscuptennis semifinals after their 5-7, 7-6, 7-6, 6-4 victory over Gille/Vliegen gives us a 3-0 lead against Belgium! Give our squad a 🇺🇸 for a hat trick of outstanding wins this weekend as we look to make it a clean sweep on Sunday! #usta #ryanharrison #jacksock #daviscup #belmontuniversity #nashville #doubles #tennis #protennis #instatennis