[1] The competitions are the Giro d'Italia, Tour de France and Vuelta a España, contested annually in that order.
[2] No cyclist has won all three Grand Tours in the same calendar year, but Eddy Merckx, Bernard Hinault and Chris Froome have won all three in succession (thus holding all titles at the same time); the only other cyclists to win all three Grand Tours at some point in their career are Jacques Anquetil, Felice Gimondi, Alberto Contador, and Vincenzo Nibali.
[6] Luis Herrera became the first person from South America and the Southern Hemisphere to win a Grand Tour when he won the 1987 Vuelta a España.
Merckx, Hinault, Anquetil and Miguel Indurain hold the record for the most victories in the Tour, with five each.
Roberto Heras and Primož Roglič hold the record for the most victories in the Vuelta, with four wins each.