Every pro has their killer serve. This is mine！Long underspin and top spin hook serve

0:00 Killer under spin long hook serves 3:36 top spin long serve 6:01 how to practice this Become a member of this channel to enjoy the following benefits： watch 10videos in advance，and 30 Fangbo tuition videos https://www.youtube.com/channel/UC9HfQ0MtTxlmPBE0MVEV-yg/join