Tennis is not the game it once was when the open era began but the Grand Slam tournaments are still as thrilling as they once were.
Regular tour matches can throw up some classics but there is nothing compared to the ebb and flow and drama of a lengthy five-set epic.
ATP Tour Finals are great events but the ones people remember are the great finals in the four majors that make up the Grand Slam.
Wimbledon, the US Open, the French Open and the Australian Open have all been around for over 100 years, with the oldest being at the All England club.
How much do you think you know about the majors? Do you know your Flushing Meadows from your Roland Garros?
Well, GMS have a treat for all discerning tennis fans and a little brain teaser to test your knowledge on the tennis Grand Slams.
Just click through on the quiz above to get 20 questions – be warned, they are not easy!