Forearm Pronation on the Serve
Jim McLennan breaks down what he proposes is the key to the Pete Sampras serve - forearm pronation, or the "forearm roll" as he calls it.
If you watch Pete's serve in slow motion, the presence of strong forearm pronation is...
Kick Serve Advice & Progression (Featuring a High Ranked Junior)
One of my favourite online coaches, Tom Allsopp of TPATennis.com, giving a couple of great tips on the kick serve.