50 Cent continues to mock Floyd Mayweather Jr by claiming he can't read

American rapper 50 Cent has continued to mock undefeated boxer Floyd Mayweather Jr by suggesting that the sportsman cannot read.

The musician recently challenged Mayweather to film himself reading aloud a passage from a Harry Potter novel for charity.

The 37-year-old has not directly responded, but he has posted a number of videos to Instagram showing off his luxury car collection and mass wealth.

On 50 Cent's Instagram page, the rapper has posted a super-imposed image of the two in a classroom with the caption: "Nigga we been here 40 minutes you can't read that."

He also photoshopped a picture of Mayweather looking as though he is trying to read the Dr Seuss classic 'The Cat in the Hat', with the message: "This is training camp stay focused champ.Stop calling around asking people to say you can read fool."