Day 2 of @daviscuptennis is always doubles day, and it was @ryan.harrison92 and @jacksock who got #TeamUSATennis over the line against Belgium with a great win! Send these two guys a 🇺🇸 if you want them in the lineup for our SF vs. Croatia on Sept. 14-16! #usta #ryanharrison #jacksock #daviscup #belmontuniversity #tennis #protennis #instatennis