Patrick Ewing, the legendary Knick who has been seeking a head-coaching gig in the NBA for years to no avail, will finally make his debut tonight. The matchup was not intentional: As the associate coach for the Charlotte Bobcats, Ewing is temporarily taking the helm while head coach Steve Clifford recovers from a heart procedure, and, as fate would have it, the Bobcats are playing the Knicks. Even without stepping foot on the court, the 51-year-old Ewing is expected to somehow grab more rebounds than Andrea Bargnani.