Lewis Hamilton on Saturday hit back at Nigel Mansell, after his fellow British world champion dismissed him as a "manufactured" driver.
1992 title winner Mansell is quoted as criticising the fact that some drivers like Hamilton are backed as karters from a young age, disadvantaging those who cannot secure such lucrative support.
"How many people from seven years of age have been given 2.5 million pounds to go karting?" he said.
Mansell, 56, also said Hamilton "didn't handle" the tough times in his F1 career so far because it was "the first time ever in his life he's had a tough time".