full-court press

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Basketball An aggressive defensive strategy in which one or two players harass the ball handler in the backcourt while the rest of the team maintains a close man-to-man or zone defense.
• noun A strong, concerted effort.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun basketball A coordinated maneuver, involving all team members, to block or interfere with the opposing team's attempt to advance the ball down the playing court.
• noun figuratively, by extension A thorough, collaborative effort to overcome or constrain another person or group, especially a rival or opponent.