Antonio scored his first goal since returning from injury in Saturday's 1-0 win over Burnley and will lead the line once more against West Brom.
Moyes admitted: “It is really difficult for us at the moment. Although I think if anything Mick has been managing himself in the games well.
“I don't think he is at full tilt at the moment, I think he is doing well, but I know there are another couple of gears for him to go into.
“I think he is protecting himself slightly at the minute, but he is an important part of the team for us, as you saw with his goal on Saturday.
“He got us the result, so we have got to be careful with him, but we also want to win games and we want to keep moving forward, so we will try and get Micky ready for the game."
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