Wycombe goalkeeper Nikki Bull produced an inspired display to deny local rivals Oxford their first win since their return to the Football League as the sides played out a 0-0 draw.
Bull made three outstanding second-half saves to frustrate James Constable (twice) and Matt Green as the Us - who hit the woodwork twice - were left cursing their luck.
Wycombe dominated the first half and Matt Phillips wasted a golden opportunity to put them ahead when he slotted Jon-Paul Pittman's pin-point cross wide from eight yards.
Oxford's main threat came from set-pieces in the first period as Simon Heslop curled a 30-yard free-kick inches wide before crossing for Constable to glance a header just past the post.
Wycombe's Andy Sandell had a curling 25-yard free-kick pushed wide by Us keeper Ryan Clarke on the stroke of half-time.
Oxford improved dramatically after the break and Matt Green raced clear but fired against the crossbar, while Wanderers midfielder Kevin Betsy chipped the ball over the bar one-on-one at the other end.
Bull then produced three brilliant saves to preserve a point for Wycombe - denying Constable from point-blank range and then tipping his fierce 25-yard shot onto the crossbar, before saving from Green one-on-one.