Last updated at 07:21

Superstar runners get set for IAAF in Moscow

Mo Farah and Usain Bolt

They are the superstars of the running world and today Mo Farah and Usain Bolt will be battling it out at the IAAF World Championships in Moscow.

Farah will be taking on the 10,000 metres, which will be his first event at this distance since winning at the London Olympics.

Bolt is looking to secure the 100m world champion title for the second time.

Good luck from Newsround guys!