GREATEST OF ALL TIME

Which sportsman is the G.O.A.T ( Greatest of All Time ) ?
I will be putting my votes to you in this short little rhyme 
In boxing my vote goes to a man named Mohammed Ali 
He was a boxing masterclass that you should ever wish to see 

Turning to tennis and Roger Federer gets my nod 
The way he plays the game is a calling from God 
Football now and Pele is my number one pick
He could light up a stadium with just one kick 

Cricket next and that is a difficult decision and call 
I will go for Ian Botham because he was brilliant with bat and ball 
The choice in athletics is a lot easier and clear 
Usain Bolt for me is the man that pocesses that extra gear 

So these are my choices and picks of the G.O.A.T 
I wonder if anyone out there agrees with me