Is it obligatory to perform ablution after ghusl if the intention for both Friday ghusl and ghusl from ritual impurity (janabah) was combined therein?

It is permissible to combine the ritual baths of Janabah (post-sexual impurity) and Jumu'ah (Friday prayer) with a single intention. The Janabah bath suffices for Wudu (ablution) because the minor impurity is subsumed within it. The one performing the ritual bath must be careful not to touch his private parts, and should wash them first, then circulate water over his entire body. However, if he intends to remove minor impurity during a non-obligatory bath, he must observe the sequence of the Wudu limbs.