Whiteside, who has not played since suffering a sprained MCL of his right knee in the second quarter of Game 3, told reporters he will travel to Toronto with Miami but remains out indefinitely.
"I can't really put a measurement on it," Whiteside said after the Heat's 103-91 victory over the Raptors in Game 6 on Friday night. "It just really depends on what the doctors say and how everything is feeling. I don't really want to make anything worse.
"I don't really have a time period for you. I'm just getting better."
"We've got a lot of talented guys on this team," said Whiteside, who is listed as day-to-day. "I believe in them guys. ... They played amazing. The guys played really well."