The Commonwealth Games kick-off in just a few months and Mo Farah is the latest big name to have doubts surrounding his participation.

There´s no doubt the games in Glasgow will be a success whatever happens, but the list of big names who could miss out may take some gloss off of the events.

Here´s a look at the top four big names whose participation remains unclear...

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Mo Farah
Usain Bolt
Jess Ennis