Tottenham supporters have been warned not to wear their club shirts in Moscow ahead of Tuesday's Champions League match against CSKA Moscow.
Around 250 Spurs fans are expected in Russia, and both the UK Foreign Office and the club have advised them not to show their colours in the city before match, which kicks off at 9:45 p.m. local time.
"Please note, for additional personal security it is suggested you do not show your football colours until you are inside the stadium," a Tottenham statement read.
"Whilst flags and banners are welcome at the stadium, we recommend that they are not openly shown in the city centre."
The Metropolitan Police told The Daily Telegraph "a small number" of its officers would be on duty in Moscow.
Kat Law, the co-chair of the Tottenham Hotspur Supporters' Trust, told the newspaper: "Obviously, it's up to everybody to be a little bit more vigilant than they perhaps normally would.
"We're always concerned about the safety of our fans, but if the club are confident and the Foreign Office are saying that it's fine to travel there, and they've take enough precautions to make sure that our fans will be in the stadium safely, then that's our bit.
"We can't legislate for what individual travellers will do when they're over there.
"You've got to be a bit respectful as well. You're going to someone else's city.
"It's a real shame if fans didn't want to explore -- Moscow's a great city. I would fully expect them to go off and do their tourist bit, but perhaps not draped head to toe in lilywhite and blue."
The game will be the first meeting between Russian and English supporters since ugly scenes marred England's opening Euro 2016 match against Russia in Marseille.
Russia fans attacked England supporters inside the Stade Velodrome after the game, with many charging into the England section.