I'm not sure what this question means. le in "le football" or "le foot" is "the" because in french you always need an article in front. e.g. le Poisson = fish.
Unless you mean what is a+le football and then the answer to that would be au.
a+le = au
le foot, le football
"Le football " (soccer in American English - what the Americans call football is called in French "le football américain").
'Le football' or 'le football américain' for the sport called football in the United States.
le foot, le football. This is a masculine noun.
lE FOOTBALL
le foot != football
'le football'
Je n'aime pas le foot / le football.
the football ground is called "le terrain de football / le terrain de foot"
"j'aime le foot / le football" We're speaking of soccer, of course. Say "le football américain" if you mean what is called football in the U.S.
"J'adore le football américain." Or if you meant to say to someone YOU love football, it would be "Tu adores le football américain."
The- the article