via Ansar Khan tweet,

RedWings practicing today before tomorrow’s game at #BlueJackets. Athanasiou and Nielsen not skating. Nielsen our tomorrow. Re-evaluated in couple days. Athanasiou questionable for tomorrow with undisclosed injury. Listed as day to day.

added 11:20am, Khan...

lines at practice:
Mantha-Larkin-Helm
Nyquist-de la Rose-Vanek
Abdelkader-Glendening-Bertuzzi
Frk-Hicketts (filling in)-Rasmussen
Defense:
Cholowski-Green
Ericsson-Daley
Kronwall-Jensen
DeKeyser (injured)-Witkowski (extra)

added 11:35am, Khan...

power-play units in practice:
Mantha-Larkin-Abdelkader (net front), Frk-Green
Nyquist-Rasmussen (net front)-Vanek, Cholowski-Bertuzzi