Article on sport that's wrong about old Louis? (7)

'louis?' is the definition.
(documentary maker Louis Theroux)

'article on sport that's wrong about old' is the wordplay.
I cannot quite understand how this works, but
'article' could be 'the' (the definite article) and 'the' is found in the answer.
'wrong' could be 'x' (X is used to mark something as incorrect) and 'x' is located in the answer.
'old' could be 'o' (abbreviation as in OT - Old Testament) and 'o' is found within the answer.
'sport' could be 'ru' (rugby union) and 'ru' is found in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?