The fit players plus Jordi Alba trained along with the B team on pitch 2 at the Ciutat Esportiva

Iniesta and Xavi did specific work on their muscle problems

The first team has continued its preparations for the Copa del Rey match with Cartagena. On Friday Tata Martino arranged a joint session with Barça B on pitch 2 at the Ciutat Esportiva. All of the available players were involved, as was Jordi Alba, who has been training with the squad since yesterday.
Xavi and Iniesta both did specific exercises. The former is having trouble with the soleus in his right leg, and the latter has hurt his left hamstring.
Barça will train again on Thursday morning at 11.00, once again at the Ciutat Esportiva. This will be the last session before they make their Copa del Rey debut away to Cartagena on Friday at 22.00.

Source: fcbarcelona.com