Bonjour Priti Arora,

'Je n'aime pas le football' is correct. When talking about things in general, or abstractly, you must use the definite articles 'le, la, l', les' . 

Here is a link that will explain this in more details: 

use-le-la-l-or-les-before-nouns-when-generalising-definite-articles

When the statement is general, the rule of using partitive article 'de' doesn't apply.

J'aime le football = I like football

Je n'aime pas le football = I don't like football

I hope this is helpful.

Bonne journée!