The Frankfurt police want to be on the road in the city with significantly more emergency services than usual because of the Eintracht football game against the London club West Ham United on Wednesday and Thursday.
Especially on Thursday, when the teams meet, the presence should be noticeably higher.
The second leg of the semi-final round of the Europa League begins at 9 p.m.
Eintracht had defeated West Ham 2-1 in the first leg.
The aim of the police operation is to prevent clashes between rival fans.
Alexander Juergs
Editor in the Rhein-Main-Zeitung.
Follow I follow
In the first leg in London, there were individual attacks by West Ham supporters on Frankfurt fans in the stadium.
Lighters and coins were deliberately thrown into the Eintracht block.
Two reporters from Hessischer Rundfunk also reported attacks.
On the short message service Twitter, one of them described how he had "been punched in the back of the head, in the neck, in the back".
In addition, his headset had been torn from his head.
Fan dispute in Seville
There had also been serious clashes between West Ham and Eintracht fans in March.
Back then, the two teams didn't play each other, but they did on consecutive days in Seville, Spain.
Several people were injured in the confrontations, and the Spanish police arrested some rioters.
The Frankfurt police are still hoping for a peaceful evening of football.
Basically, there is no deep animosity between the Frankfurt and London fans.
"In the past we have had games with significantly more potential for conflict," explains a police spokesman, citing games against the Belgian club Standard Liège or against the team from Lazio Rome, some of which have right-wing extremist supporters, as examples.
Speech in English and German
Many police officers are said to be on duty, especially in the city center, on the Römerberg, on the banks of the Main and in the station district, where there is a pub that is traditionally frequented by British fans.
Around 2,400 tickets have been sold to West Ham supporters for the game, but it is likely that a number of other unticketed fans will also be arriving.
"Our mission is primarily about communication," says the police spokesman.
This also means, for example, that London fans who have arrived without a ticket will be asked to watch the game in the city center instead of going to the Waldstadion.
Because unlike in London, there are no pubs around the Frankfurt stadium where the game can be watched.
"We will point this out to the fans." The police officers will therefore formulate their loudspeaker announcements in two languages - in German and English.