Wests Tigers star Benji Marshall was involved in a "social-distancing matter" with a reporter on Wednesday.
Marshall, 35, was dropped from the Tigers' starting team on Tuesday ahead of their clash with Canberra Raiders.
A day later, the Tigers co-captain breached coronavirus protocols with a reporter, who will undergo a test for COVID-19.
"Wests Tigers are aware of a bio-security matter at training today involving co-captain Benji Marshall," a club statement read.
"Marshall was involved in a social-distancing matter with an accredited reporter, which was immediately reported to the NRL as per guidelines.
"Under those guidelines, Marshall will remain at home tomorrow – which is a scheduled day off for Wests Tigers NRL squad – while the reporter undergoes a COVID-19 test.
"Assuming a negative result is returned, no further action will be required by Marshall or Wests Tigers."
The Tigers have won two of their opening four games of the season ahead of facing the Raiders on Saturday.