You can't. That defeats the purpose of using Teams in the first place.Tickets can be assigned to:an agenta Department -OR- a Team
Agents (singular) are individuals. If you assign a ticket to only an agent that agent is the only one who can see a ticket.
Teams are a collection of agents that spans departments. If you assign a ticket to a team it is to that TEAM, and any member of the team can see the ticket.
Departments are a collection of agents in a specific department. If you assign a ticket to a Department any member of the Department can see the ticket.