The current rivalry between Rory McIlroy and Lee Westwood appears to be heating up, as we saw at the Arizona WGC Match Play semi final back in February. It got me thinking about great sporting rivalries, of which there have been many examples over the years: McEnroe vs Borg; Fischer vs Spassky; Ali vs Frazier; Senna vs Prost: Celtic vs Rangers to name a few.

Callaway Golf Company staff professional Arnold Palmer added to his legendary list of golf achievements on Tuesday, November 8th, when he notched his 20th hole-in-one while playing an afternoon round on his home course in Orlando, Florida.

We have seen many champions don the famous green jacket over the years, some more than once. With a new champion likely to be unveiled in just a few days, Leaderboard takes a look at ten of the greatest Masters players of all time.

Martin Laird is in the lead after the second round in the Arnold Palmer Invitational at Bay Hill in Florida.

Spencer Levin is in the lead at the Arnold Palmer Invitational at Bay Hill in Florida.