List of Grand Slam boys' singles champions
List of Boys' Singles Junior Grand Slam tournaments tennis champions.
Champions by year
| Legend |
| Player won all 4 Grand Slam tournaments in the same year |
| Player won 3 Grand Slam tournaments in the same year |
| Player won 2 Grand Slam tournaments in the same year |
| Bolded name indicates player went on to win at-least one Senior Grand Slam title |
Statistics
Most Grand Slam singles titles
Note: when a tie, the person to reach the mark first is listed first.| Titles | Players |
| 5 |  Newcombe |
| 4 | Crawford,  Martin,  Edberg, Kratzmann |
| 3 | Bromwich, Rosewall, Buchholz,  Korotkov,  Pereira,  Elsner,  Monfils |
Grand Slam singles titles by country (since 1973)
Completed the Grand Slam
- '''Australian—French—Wimbledon—U.S.:
- *1983 Stefan Edberg
Winners of three Grand Slam singles tournaments in the same calendar year
- Australian—French—Wimbledon:
- *2004 Gaël Monfils
- Australian—Wimbledon—U.S.:
- *1984 Mark Kratzmann
- '''French—Wimbledon—U.S. treble:
- *1988 Nicolás Pereira
Winners of two Grand Slam singles tournaments in the same calendar year
- Australian—French:
- *1952 Ken Rosewall
- *1961 John Newcombe
- *1962 John Newcombe
- *1968 Phil Dent
- *1997 Daniel Elsner
- Australian—Wimbledon:
- *1989 Nicklas Kulti
- *1991 Thomas Enqvist
- Australian—U.S.:
- *1995 Nicolas Kiefer
- *2000 Andy Roddick
- French—Wimbledon:
- *1958 Butch Buchholz
- *1963 Nicky Kalogeropoulos
- *1966 Vladimir Korotkov
- *1976 Heinz Günthardt
- *1978 Ivan Lendl
- *1979 Ramesh Krishnan
- *2018 Tseng Chun-hsin
- French—U.S.:
- *1990 Andrea Gaudenzi
- *2002 Richard Gasquet
- Wimbledon—U.S.:
- *1973 Billy Martin
- *1974 Billy Martin
- *1977 Van Winitsky
- *1982 Pat Cash
- *2008 Grigor Dimitrov
- *2012 Filip Peliwo