The father of world champion and record holder Tobi Amusan, has urged Nigerians to ignore comments made by American track legend Michael Johnson after his daughter’s heroics at the World Athletics Championships in Oregon.     Earlier this week, Amusan won her semifinal heat when she crossed the finish line at a time of 12.12 seconds, smashing the previous best of 12.20sec set by American Kendra Harrison in 2016.     But Michael Johnson, who won four Olympic gold …