5 things that make you wonder if Conor McGregor really does have a chance against Floyd Mayweather

Floyd's age

Floyd may be in great shape...but he's 40 years old (PC: The Sun)

You'd often hear sportspersons -- especially those on top of their respective games -- reel off cliched lines like 'age is just a number' when quizzed on how long they still wish to continue.

In combat sports, however, that isn't entirely true.

The commonly accepted theory is that a fighter's power is the last attribute that fades away with age, but it is almost always the speed and reflexes that go first.

40 years old and two years retired, Floyd Mayweather was the first one to himself accept that he isn't the same fighter he was just a couple of years ago when he fought Andre Berto.

Whether he said that to sell the idea that Conor McGregor has a greater chance than many think he does or whether he actually believes in it, it would still appear to be true.

And despite not having any prior professional boxing experience, Conor does have the exuberance and intensity of youth on his side.

Will it count for something come fight night? We'll have to wait and see.

But should McGregor actually knock Mayweather out, a lot of people are going to turn to the excuse that a 40-year old man just wasn't as quick as he used to be.