Allyson Felix may not be competing in her favourite race at the Rio Games .
The US track star insisted Allyson Felix was wholly focused on adding 400m gold to Allyson Felix 's impressive haul of major championship medals .
Allyson Felix may not be competing in her favourite race at the Rio Games , but the US track star insisted she was wholly focused on adding 400m gold to her impressive haul of major championship medals .