Despite receiving plaudits from experts and fans in and out of the sport, Hamilton has been a divisive figure in the eyes of the general public, with some journalists arguing his exploits on the track have been under-appreciated. Holden has suggested that racial bias may have contributed towards Hamilton's perceived lack of popularity relative to his achievements, with Hamilton's race and physical appearance—being mixed-race and often seen sporting earrings, dreadlocks and designer clothing—alienating some of the sport's traditional white, elderly male fanbase. Others have attributed his lack of appreciation to the perceived predictability of results during the turbo-hybrid era, likening his period of dominance to that of Schumacher in the early 2000s, and to tennis players Steffi Graf and Martina Navratilova, all of whom became more appreciated in the latter part of their careers.