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They've been dating for nine years but there's still no sign of Enrique wedding Anna Kournikova.
The 'Heartbeat' star told Closer magazine, "I think marriage is great, but personally, I don't think it makes a lot of difference. It's too much of a commitment."
The 35 year old went on to add "Relationships are difficult - they're great when everything is going well but they're a lot of work too."
Enrique said Kournikova, now 29, was the only serious girlfriend he's ever had.