Bartley was just reaching his best form when he was sent off for celebrating a goal last week.
"It has been a bit of an up-and-down season for me," said the 22-year-old to the Birmingham Mail. "But I think I have finally got my fitness together, found my feet and I feel a lot sharper.
"Like every player, there are things you work on, every day and every week.
"And for me, it is also just to continue to do what I have been doing and play games.
"If I get a good run of games then I think you will see the best of me."
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