If you mean "guarding" Ming - it is Danny Ferry, and believe it or not he is about 6' 10" (2.08 meters) tall. Ming must've jumped or Danny must be squatting down in that pic.
That was the one bad shot Yao Ming put up all night. (Incidently, Steve put up about 3, it wasn't Steve's best game) I'm quite sure the coaches told him to just go straight up next time, no need to lean in and make the shot harder, especially when the defender is Ferry. The shot Robinson 'blocked' was due to Ming being out of position and just putting up the shot out of desperation\nervousness.