Mats Hummels is flattered to be attracting interest from over Europe but has no intention of leaving Borussia Dortmund.
If Danny Rowe departs Rotherham again this season it will only be to Wycombe, according to Millers boss Steve Evans.
The 18-year-old has put pen to paper a one-year deal, with the option of a further 12 months.
Preston has been with the Blues academy for over five years.
He had a loan spell at Skrill North side Worcester City last season where he made two first-team appearances for the Dragons.