Where can I find concrete tennis practice wall in lowell area and around?

I assume you mean Lowell, MA. Try these locations and see if they have a practice wall a href="http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=tennis+courts+near+lowell,+ma&aq=&sll=42.633425,-71.316172&sspn=0.168473,0.220413&gl=us&g=Lowell,+MA&ie=UTF8&hq=tennis+courts&hnear=Lowell,+Middlesex,+Massachusetts&ll=42.631938,-71.28067&spn=0.648649,0.881653&t=h&z=10" rel="nofollow"http://maps.google.com/maps?f=q&source=s…/a Good luck :)