Explanation of mountain ranges

The numbers one to eight represent rounds of Grand Slam tournaments. 1=1st round, 2=2nd round, 3=3rd round, 4=4th round, 5=Quarter finalist, 6=Semi finalist, 7=finalist, 7.5=loser of Challenge round and 8=winner. Grand Slam events have been classed as containing either 32, 64 or 128 players. If a player lost in the second round of a 32 draw tournament then he was credited with a 2 peak, but by winning just one more match and losing in the quarter finals (the third round) he would be credited with a 5 peak. In a 128 draw he would have to win four matches to reach the quarter finals (the fifth round) and to be credited with a 5. Whilst this is rather unfair, it is fairer than crediting first round losers in a 32 draw tournament with a 3. All Grand Slam men's singles events have had at least 64 draws (and mostly 128) from 1961 onwards. Sometimes there was a preliminary round at the Australian before 1960 (and a couple of times at the U. S. in the 19th century and once at the World Hard Court championships) containing very few matches which was ignored for the purposes of the graphs to stop players who lost before the quarter finals accumulating higher peaks due to first round byes. In all these cases no Grand Slam finalist lost in this preliminary round. At the Australian Open in 1906, 1908, 1909, 1910, 1912 & 1913 and Wimbledon in 1887 there was only one round before the quarter finals (16 draw). At Wimbledon in 1923 and the U. S. Open from 1908-1914 there were more than 128 players (256 draw). This extra round has been classed as a qualifying round. If a player lost his opening match on a walkover he is deemed not to have appeared. From the 1970s he would be replaced by a lucky loser from the qualifying tournament, but before that there were often a number of first round walkovers.

The Australian Open was treated as 32 draw 1905-1915, 1920-1923, 1929 & 1931-1960; treated as 64 draw 1919, 1924-1928, 1930 & 1961-1981 and treated as 128 draw 1982-present. The World Hard Court championships was treated as 32 draw 1912-1913 & 1920 and 64 draw 1914 & 1921-1923. The French Open was treated as 64 draw in 1925, 1939 & 1946 and treated as 128 draw 1926-1938 & 1947-present. Wimbledon was treated as 32 draw 1877 & 1882-1897; treated as 64 draw 1878-1881 & 1898-1904 and treated as 128 draw 1905-present. The U. S. Open was treated as 32 draw 1881, 1883-1889 & 1943-1944; treated as 64 draw 1882, 1890-1892, 1894, 1896-1901, 1917, 1923, 1925-1928, 1941-1942, 1945 & 1949-1950 and treated as 128 draw 1893, 1895, 1902-1916, 1918-1922, 1924, 1929-1940, 1946-1948 & 1951-present.

On the pro graphs the numbers one to five represent rounds (or positions in round robin) in pro events. All pro events were classed as 8 draw or 16 draw except 1933 French Pro, 1936 & 1938 British Pro and 1961 US Pro, which had four or two draws. The US Pro in 1927, 1928, 1929, 1930, 1933, 1936, 1937 & 1962 are not included because no former Grand Slam champion was in the draw and the US Pro in 1943 and 1945 are also not included because they were depleted wartime championships.