Barca continued to dominate but did not seriously challenge Van der Sar until the United goalkeeper tipped a long-range shot from right back Zambrotta over the bar.
Messi and Iniesta sliced open United's defence with a gleaming one-touch passing move that left the ball in the path of Samuel Eto'o (in pic) but the Cameroon striker hit the side netting.
Complete Coverage: UEFA Champions League