Hardwick listed Ben Lennon, Oleg Markov, Ivan Maric and Anthony Miles as the players in the selection mix for the game against the Blues.
Miles (32 disposals) continues to play consistent football in the VFL and will be under strong consideration, according to Hardwick.
"There'll probably be a couple of changes," Hardwick said.
"We've got some guys not playing to their highest level in the AFL at the moment, so we'll look at that more closely on Friday."
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Dustin Martin has been hampered by a lower back issue and Hardwick said the club would continue to manage the second-favourite for the Brownlow accordingly.
"I don't think many players are 100 per cent fit at the moment," Hardwick said.
"Dustin went in to the game, like a lot of other players, a little bit sore, but he played OK without playing to the usual standard we expect.
"But he'll be better this week and he's had a good week on the track thus far. He'll train today and hopefully we'll get a better result for both him and the team this week."
http://www.afl.com.au/news/2017-06-21/sore-dusty-in-better-shape-for-blues-clash