WATCH: Delgado, Rusedski serving tips
Greg Rusedski and Jamie Delgado gave a serving masterclass on Sky Sports - and got a surprise visit from a tennis legend.
Nadal's ATP Finals woes
Rafael Nadal has never won the season-ending ATP Finals and injury has once again prevented him from winning the coveted title.
QUIZ: Know your ATP Finals?
Test your knowledge on the season-ending tennis extravaganza ATP Finals and don't forget to catch all the action on Sky Sports.