It's actually nil and it means zero.
Means that one team didn't score any goal.
The definition of the word nil is nothing or worthless. In a sentence it is used like this: His bank account is worth nil. It just means his account is worthless.
"nul" means of no value, worth nothing, with a worth of zero. "c'est nul" = that's rubbish. In football ('soccer' for Americans): a draw = un match nul.
nil
Nil.
Nil
Nil.
zero
It means zero.
Nought Nil
Their score is nil