Kane Ferdinand’s first-half effort made it back-to-back Vanarama National League wins for Maidenhead after a 1-0 victory at home to Halifax.
Alan Devonshire’s side had pushed Sky Bet League One outfit Oxford close in a 2-0 loss in round one of the FA Cup last weekend and bounced back to stun high-flying Halifax.
Ferdinand broke the deadlock in the 36th minute when he flicked home after Jayden Mitchell-Lawson’s cross.
It remained 1-0 until half-time, but Maidenhead were reduced to 10 men when Charlee Adams was shown a second yellow card in the 85th minute.
Halifax piled on the pressure afterwards, but late saves by Craig Ross helped the hosts move up to 20th.