Singer Enrique Iglesias, whose new album is titled "Sex + Love", says a mix of both things are required for a successful relationship.

The Latino star, who has been in an on-off relationship with tennis player Anna Kournikova since 2001, believes love doesn't work without the physical side of things, reports contactmusic.com.

Asked which of the two things in his new album's title, `Sex + Love` he can't live without, he said: "That's a tough one! Some couples would say that sex isn't important but I tend to disagree with that. Sex is extremely important! Sex keeps you alive... but obviously without love... I think it's a balance of both.

"I think too much sex can probably be bad, but just love by itself can be difficult - if you're in a relationship that can be difficult to survive. I think you need both."