Miller was transfer-listed last week for poor time-keeping and did not make the squad for last weekend's goalless draw at Derby.
But today Keane said that Miller had knuckled down in training this week and had also impressed playing for the reserves in their 4-1 win at Wigan.
Keane said: "Liam's shown a good attitude and done himself no harm but we will have to wait and see."
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The full article contains 122 words and appears in Sunderland Echo newspaper.