Kammala jumla mai zuwa: Whitecross ya yi gasa a cikin manyan 'yan wasa guda shida a gasar Australian Open, ba tare da ya wuce zagaye na farko ba. Mafi kusa da ya zo shi ne a 1982 Australian Open lokacin da ya rasa Damir Keretić a cikin saiti biyar, bayan da ya yi ikirarin biyu na farko. Ya kuma bayyana aƙalla sau ɗaya a sauran manyan wasannin Grand Slam guda uku, yana wasa a US Open na 1980 (Víctor Pecci ya doke shi), Gasar Wimbledon ta 1980 (a cikin mazan biyu), Gasar Wimbledon ta 1982 (wanda Eddie Edwards ya yi),
1984 Wimbledon Championships (a cikin gauraye biyu), da kuma 1984 Faransa Open (a cikin maza biyu).