Good morning Situation : there is on master site :

Good morning
Situation : there is on master site : master-site.com with buddypress and subdomain blog creation. Its Ok, it create subfolder
There are four services sites : serv1-site.com, serv2-site.com, serv3-site.com and serv4-site.com and they are attached with domain-mapping so :
1. serv1-site.com = subsite1.master-site.com
2. serv2-site.com = subsite2.master-site.com
3. serv3-site.com = subsite3.master-site.com
4. serv4-site.com = subsite4.master-site.com

Is it possible to create subsite from serv4-site.com and got ser4-site.com/subfolder1 for ex use domain-mapping with is ?
Thank you
Laurent