^^^Where are you based TennisFan?
Certifications vary from country to country and some carry more weight than others in respect of what they involve having to do to achieve them. Technically as tennis coaching is a non-regulated industry you don't have to have any certification at all to call your self a coach, but you should at the very least look for a coach with certification from a recognised awarding body and public liability insurance. At least you know you're are getting somebody with a recognised teaching ability (even if it is to a low level) and are protected if something negligent happens.
Best bet is recommendation from friends/colleagues or checking out the area and seeing which coaches work with which types of players - some coaches are better with performance kids, others better with beginner adults - generally their cliental will give you an idea who they are comfortable coaching.
Don't be upset by the results you didn't get from the work you didn't do...
talkcoaching on wordpress, come check it out :)
Last edited by Ash_Smith; 01-08-2013 at 11:49 AM.