KINGSTON – The world’s fastest man Usain Bolt has split from blonde fashion designer girlfriend to concentrate on winning Olympic gold at London 2012, it was claimed on Friday.The Jamaican sprint star has dumped Slovakian-born Lubica Slovak after six months so she won’t ‘distract’ the 25-year-old from his Olympic training, it was reported.Bolt’s split from Slovak, 28, with whom he was said to have a ‘very serious’ relationship, comes just days after a race row erupted in his native Jamaica over his choice of a white girlfriend.The split was revealed on Jamaican news website The Jamaica Star, days after sources close to the couple had insisted they were ‘very much in love’.A source close to the Jamaican described the split as a ‘mutual decision between two adults’. Bolt’s agent today confirmed that the Jamaican sprinter is ‘single’, but would not provide further comment.Track star Bolt Bolt has come in for criticism from fellow black Jamaicans unhappy that he has chosen a white partner.One online posting said: ‘Really now Usain! Some successful black men obviously suffer from a white woman complex. You too?’, while another complained: ‘Another one of our men snatched.’Further protests included: ‘Out of all the girls on this island you pick a snowbunny’, and: ‘These superstars will always disappoint if we depend on them to raise our racial identity.’