Job search advice?

I got a call at the end of the day yesterday from HR at the company I currently work for regarding another job I applied for in the company. He seemed to think it was a perfect fit and said he was forwarding my info to the hiring manager, and that he would reach out to schedule an interview for next week.

I haven't heard anything from the manager yet. At what point should I be concerned/ reach out again? Any tips? Thanks!