Linfield have issued a warning to their fans ahead of Saturday's Irish Premiership trip to Portadown.
The Blues said they have been contacted by the Ports over concerns that some away fans have purchased tickets for the home section of Shamrock Park.
A bumper crowd is expected for the game, with league leaders Linfield taking on a resurgent Portadown side who currently sit fourth in the table.
READ NEXT: Rory McIlroy opens up on Tom McKibbin LIV talks as he voices 'disappointment'
READ NEXT: Michael Newberry: Linfield open up Windsor Park for fans to pay special tribute
Linfield issued a statement to their supporters on Wednesday.
It read: "Portadown FC have made us aware that they are concerned about Linfield supporters buying tickets in the home section ahead of Saturday's game at Shamrock Park and have issued the following advice:
"'Supporters wearing Linfield colours will be refused entry to the home stand. If fans are identified in the stand and their presence may lead to public order issues, then it may be necessary to eject them from the ground'."
Sign up to our free sports newsletter to get the latest headlines to your inbox