Cambridge extended their unbeaten league run to nine games with a 1-0 victory at promotion rivals Chesterfield.
Shane McLoughlin’s goal just before the interval gave the visitors a win which saw them draw level with their opponents and ended Chesterfield’s three-match winning run.
Cambridge rode their luck at times before scoring.
In-form Chesterfield striker Lee Bonis caused panic in the opposition defence with James Gibbons forced to make a vital clearance as the ball headed towards goal.
A Dylan Duffy corner then led to a goalmouth scramble, with Bonis hitting the crossbar from close range.
Another big chance for the hosts came when Jamie Grimes headed over from just a few yards.
The only goal came a minute before the break when James Brophy caught Chesterfield on the break and slipped a great ball to McLoughlin whose deft chip beat goalkeeper Zach Hemming.
Chesterfield never seriously threatened to draw level, with substitute Will Grigg glancing a header wide and Kyle McFadzean firing over with a dipping shot.
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