I usually use short slow service to surprise opponent who is overusing staying far away from line.
Sometime it works, but amount of winning returns with not cord is ashaming for game.
What is so special in returning short service that make this net cord?
// Im mad, I lost today two matches with losing breaks points by this.
Ranked singles:  / Career ranking: 
R4 R2 R3 R2
Best result: Australian Open 2014 [GS] R4
Greatest scalp: def Mohamed (22) 5-7 6-4 7-5(4) ('s-Hertogenbosch 2014)