Categorias sports video Tennis instruction: The serve to lag or not to lag – YouTube Autor do post Por rob Data de publicação abril 7, 2013 Tennis instruction: The serve to lag or not to lag – YouTube. Tags tennis ← www.youtube.com/watch?v=BMTgvcX6bts → Federer backhand slice common threads with Haas, Wawrinka &Youzny. – YouTube