'Undoing' Submitting a Review for Approval

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One of our managers completed a review and submitted it to his manager for approval before the employee added his comments.  He did not realize that when he does this, the employee no longer has the chance to do a self-evaluation.

Is there a way that an Administrator can 'undo' the reviews submission for approval?  What if the Manager 'Rejects' the review.  Will this make is available for the employee to complete the self evaluation?

Monica