Barça are huge favourites, why not bet on their win?

Because after three months without a match, the odds are low and nothing is guaranteed. Betting on goals for both sides is a clearer angle than the result.

Elche have lost a scorer, can they really score?

They have found the net in their last two meetings against Barça, and Valera is still there to create. Against a rusty Catalan defence, one chance may be enough.

What if Barça keep a clean sheet?

That's the accepted risk: they've kept a clean sheet twice in six matches. But Elche have scored in every recent meeting, making this scenario less likely.