original_query: What is the playing style of the team when they have possession of the ball?
query: What is Marcelo Bielsa's team's playing style when in possession?
answer: Bielsa's teams utilize quick transitions from defense to attack, with players capable of both defensive and attacking duties.  His formations, such as the 3-3-3-1, aim for numerical superiority across the pitch, allowing for attacks with six or seven players.  When in possession, players rapidly move to attacking positions, and when the ball is lost, aggressive pressing is employed to recover it.