CJ Ujah: Meet the runner hoping to be as big as Usain Bolt

It's not been long since superstar sprinter Usain Bolt retired.

During his running career he set a world record and won eight Olympic gold medals.

So now the big question is who will take his place?

British runner CJ Ujah, who can run the 100m in 9.96 seconds, believes he can be the one.

Leah's been to meet him.