Training Day Thursday: #NetGeneration ambassador Milan enjoyed a truly cool moment when she got a serving lesson from none other than Hall of Fame coach @officialnickbollettieri! Give her a 👍 for all of the progress she’s made this year! 📹: @milantyson _ #usta #netgennetset #nickbollettieri #tenniscoach #tennistraining #tennis #kidstennis #instatennis