Talk to Jackie Grimaldi to get the objectives for this racket. Not all objectives will be immediately available so you have to complete the preceding ones first.
Bug: There might be a bug where you have completed all the available objectives and the damage remaining to the racket is still way too high to trigger the next objective, you may want to head to the headquarters (the supermarket, north of the district) and kill everyone / loot the cash there. Keep doing this until you receive the notification to talk to Jackie again to continue forth with the remaining objectives to take down this racket.