CHARLTON have signed Denmark under-20 international Martin Christensen from Herfolge Boldklub on a pre-contract basis.

The Addicks have paid an initial £250,000 for the highly-rated 19-year-old right-winger, who has signed a four-year contract.

And as part of the deal, which could potentially rise to £350,000, the Premiership club will also sponsor the youth academy of the Danish first division side for the next three years.

Alan Pardew said: "Martin's a great prospect and we think very highly of him.

"It's going to be a big step-up for him to this level of football but he's of a good age and we feel he'll progress very quickly with us."

Christensen, who has also represented his country at under-18, under-19 and under-20 level, joins compatriot Dennis Rommedahl, a senior Denmark international, and young goalkeeper Mads Nielsen at The Valley.

Herfolge won the Danish Superliga title in 2000.