Really it just depends how strong economically the boxing is where you come from. For instance - Roy, Floyd, Oscar, Mosley, Ward and the majority of great modern Americans spend entire careers with home advantage, never experience hostile territory, unfamiliar daily routine, home influenced judges, language barriers, problems with accommodation, unfamiliar rules of the commission, media and promotional commitments, food, etc.

Quite simply they never leave home because they don't have to, which is the same for the great fighters from Japan, UK and Germany, they earn fortunes so need a serious incentive to travel.

Just recently Ryota Murata, the WBA middleweight champion, got 17 million TV viewers for his latest defence. Juergen Braehmer, former lightheavy champ, along with several other German champs, regularly clock around 10 million eyeballs. And obviously they are fighting in packed venues, boxing is big business in these places.

Golovkin fought in 8 or 9 countries on his way up the ladder, moved his entire family to three different countries with completely different cultures and languages, it's something I think many fans overlook, just how big an achievement it is for fighters that literally have to travel the world to make it.