Nothing could separate Wanderers and Colchester in a tight clash at Adams Park.
Wanderers looked the likelier to make the breakthrough and enjoyed plenty of the ball, but the visitors defended well as Blues were held to their first 0-0 draw of the season.
Dave Winfield had the first chance of the game in the 16th minute, but his header from Marvin McCoy's cross was cleared off the line by Colchester's Brian Wilson.
Gary Doherty blocked Anthony Wordsworth's shot, but the best effort of the first half came in the 28th minute when Matt Bloomfield skipped past one Colchester challenge and forced Ben Williams into a flying save from 20 yards.
Craig Eastmond fired wide from distance after Blues enjoyed a prolonged spell of possession, but neither side could force the breakthrough in a tight opening 45 minutes.
Ben Strevens shot over the bar soon after the restart, but it was the visitors who had the best chance early in the second half.
Steven Gillespie charged down Nikki Bull's clearance, but Wanderers' keeper redeemed himself by making a fine stop from close-range.
Stuart Lewis tested Williams again from 20 yards, but he made a good save low to his right.
Doherty came close to breaking the deadlock with 15 minutes remaining, but he headed Matt Bloomfield's corner straight at Williams after evading his marker.
Blues had a penalty shout for handball turned down by referee Simon Hooper after another Bloomfield corner caused havoc in the Colchester area and they piled on the pressure.
Danny Foster had Wanderers' final chance with four minutes remaining, but he volleyed over from outside the area, while Anthony Wordsworth headed Ian Henderson's cross straight at Bull.
Wanderers: Bull, McCoy, Foster, Winfield (c), Doherty, Lewis, Eastmond, Bloomfield, Strevens, Hayes, Beavon.
Subs: Laing, Johnson, Dunne. Ainsworth, McNamee.
Bookings: McCoy, Strevens, Eastmond.
Colchester: Williams, Wilson, White, Okuonghae, Eastman, Henderson, Izzet, Rowlands (Bond, 24), Wordsworth, Odejayi, Gillespie (Sears, 79).
Subs: Rose, Heath, Duguid