Canterbury’s preparations for their NRL sudden-death semi-final against the Sydney Roosters have been disrupted, with players reportedly quarantined from the rest of the team as a virus spreads through the Bulldogs.

According to Fairfax Media, at least two Canterbury players have been kept away from Belmore this week as they battle a virus.

It is understood one of the players had not trained all week while another was told to leave on Wednesday after also starting to show flu-like symptoms with a severe head cold.

The duo should play on Friday night at Allianz Stadium but remain in doubt.

It is unclear if they will be on hand on Thursday morning to complete the captain’s run.