Known as the Ice Man for his steely confidence on the court, Borg would always prepare for the annual tournament by growing a beard and wearing the same Fila shirt.
When the Doctor married River, Rory became his father-in-law.
But for some stars, a little superstitious reasoning is the added edge they need to get into the zone. Michael Jordan You wouldn't think the greatest professional basketball player of all time would rely on superstition, but even Michael Jordan himself was known for a specific quirk.
While leading the Chicago Bulls to six NBA championships during his legendary career, the five-time MVP wore his University of North Carolina shorts under his uniform in every game.
In the car he would fall asleep and, if we were driving from London to Derbyshire, wake up with a whoop when we turned the corner into our village.
After he had inspected the house, room by room, he would sit on the first landing, staring out of the window and grumbling at the ramblers who changed into hiking boots sitting on our wall. Buster had to guess which of my hands - on the stair below him - held the biscuit.