Adam Lallana admits it would be "devastating" for England if they were kicked out of Euro 2016 over crowd trouble.
FA chairman Greg Dyke has voiced his fears over security arrangements for Thursday's match against Wales, and midfielder Lallana is praying there is no more trouble.
"It would be devastating," he told a press conference.
"Our message is for everyone to be safe and sensible. By all means enjoy the match, but be respectful that we are out there."
Liverpool's Lallana admitted the violence had been discussed among the England players, but vowed to focus on events on the pitch in Thursday's pivotal Group B encounter.
"A little bit has been discussed," he added. "I didn't see it - I heard what Joe saw but I was getting a drugs test - and it's not nice to see.
"We've just got to hope the security is there and trust everyone to do their job.
"I've got friends and family coming to the game but I trust everyone to be sensible and safe. It's a big game and I've got to focus on my job and hopefully everyone can do their job off the field.
"I'm not concerned it will be a distraction."