Manager John Farrell said Victorino would likely report to the clubhouse Saturday night during the game to get treatment and leave before his teammates return to the clubhouse.
"He's still in that phase," Farrell said. "I don't have an update on how long his separation from the team will be. That'll be dependent upon how quickly he gets through the flu."
Whether Victorino's illness affects the progress and rehab on his hamstring remains to be seen.
"I can't tell you if it's going to prolong the DL time or when his date of return will be," Farrell said. "I don't think we had a specific date on the calendar that we expected him back regardless of the flu. So [we've] just got to progress through it."
Maureen Mullen is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.