Cologne has moved prostitutes away from the inner city

A woman dressed as a condom will also help promote the safe sex message outside the Olympic Stadium, Berlin official Martina Schmiedhofer said.

The free condoms will be accompanied by leaflets giving men advice on how to behave with prostitutes.

The campaign will target fans at all six matches in Berlin.

The leaflets will set out 10 "rules" for prostitutes' clients, Ms Schmiedhofer, health director for Charlottenburg-Wilmersdorf district, told the BBC News website.

She said the messages would include: be polite and respectful towards prostitutes; maintain a high standard of personal hygiene; always use a condom and be clear about what you want.

'Sex sheds'

Similar campaigns have been staged for major events in the city before, she said.

Prostitutes from other parts of Germany are expected to turn up in the capital for the World Cup, she added.

She ruled out Berlin introducing so-called "sex sheds" - special drive-in enclosures for prostitutes and their clients which have been pioneered in Cologne.

The German news magazine Stern says an area the size of a football pitch was earmarked for prostitution in Cologne's Longerich district in October 2001.

It was fenced off and photography was banned there. The enclosure was designed to stop illegal kerb-crawling in the city centre and according to Stern, it has been declared a success.