The Reuters global sports blog
If Justin Gatlin, back in action this week after a four-year doping ban, were to line up alongside Jamaican Usain Bolt in the 2012 Olympic 100 metres final in London, who would American fans want to win?
Having served his time, is former world and Olympic champion Gatlin worthy of his place or, as some have suggested, should all convicted dopers be forced to pin a massive asterisk on their vest to remind the world of how they made it to the top?
British athletics went through the same process with the return of Dwain Chambers and though British Olympic Association rules prevent him or any other convicted doper representing Britain in the Olympics, he has raced in European and World Championships.
As Chambers lined up in the European Championship final last week, former team mate and now TV analyst Steve Backley said that despite wanting to see a British medal he did not really know whether he wanted Chambers to do well.