New signing Jamie White got off to a good start on his debut for Moneyfields when he put them in front after less than 4 minutes.
But Cambridge earned a point, thanks to a Jack Vasey goal on the half-hour mark.
Diamonds won 2-0 at Ashford Town (Middx), taking an early 5th minute lead through Tom Lorraine and then doubling that through recent signing Ryan Robbins after 21 minutes.
AFC Dunstable and Beaconsfield Town are both level on points with Diamonds after wins on Saturday.
AFC won 2-0 at third-bottom Hanwell Town, thanks to goals from Louis Bircham 3 minutes after the break and then BJ Christie 2 minutes from the end, while Beaconsfield were comfortable 4-0 winners against neighbours Marlow at Holloways Park.
Aaron Minhas scored the only goal of the first half in the 27th minute, and then Jordan Ajanlekoko doubled that 5 minutes after half-time and a late brace from Goldy Capela in the 83rd and 88th minutes finished Marlow off.
Hayes & Yeading United are sixth after recording a 2-1 win at Sharpenhoe Road against Barton Rovers, whose Andrew Phillips put them in front after 34 minutes.
But Duncan Culley equalised 4 minutes into the second half and the striker added the winner 7 minutes from time.
Aylesbury FC`s improved form continued with a 1-0 win at Chestnut Avenue against Northwood, courtesy of an 11th minute Brian Haule effort, while bottom side Arlesey Town are six points adrift after losing 3-2 at Honeycroft against Uxbridge in the day`s other game.
Tony Williams gave the struggling visitors an early 5th minute lead that Dylan Kearney cancelled out in the 16th minute.
Six minutes later, the Reds were in front through Cole Brown and a second for Kearney on 41 minutes made it 3-1.
A Cory Watson own goal right on half-time gave Arlesey hope, but Tony Choules` side held firm.
The tie between Bedford Town and Fleet was postponed due to exceptional circumstances.
By Steve Whitney
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