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Ready, steady, go! Take the World Championships quiz

Tonight the eyes of the sporting world will be on London with two of the biggest athletes in history at the World Championships for the last time.

Mo Farah Credit: PA

Usain Bolt and Mo Farah are both retiring from the track. Farah races tonight before hanging up his spikes at the end of the season. Then tomorrow night will be Bolt's last ever 100m race.

Usain Bolt Credit: PA

It's all happening at the stadium where they both won gold in 2012.

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