The young midfielder with the lovely knack of grabbing or setting up a goal booked our place in the quarter-finals of the Worthington Cup with an opportunist strike with just four minutes remaining.
Playing wing-back in Mauricio Taricco's absence, Davies latched onto the loose ball following Darren Anderton's free-kick and despatched a left-foot shot into the bottom corner.
It was a smash and grab raid after Fulham enjoyed the greater share of possession in the second half but the home side failed to create a decent chance and we always looked dangerous on the break.
Sergei Rebrov certainly came back with a bang in his first start since September - he needed stitches after a clash of heads in the second minute.
He was off the field for eight minutes in total but it took just another four minutes for a bang of another sort - latching onto Sheringham's cushioned header before smashing the ball home from 18 yards.
It remained a tight affair as both teams played their football without penetration until we carved out two chances in as many minutes.
With 24 minutes on the clock Rebrov and Davies combined down the right, Rebrov's cross found its way to Ziege at the far post and the German wing-back struck the junction of post and crossbar from an acute angle.
Three minutes later our best move of the half ended with Sheringham holding his head in his hands after just missing Ziege's volleyed cross by a fraction.
The home side continued to press forward and got their rewards on the stroke of half-time. Finnan, always dangerous down the right flank, whipped a ball in and Hayles, with a yard of space, guided a diving header home.
Fulham started the second half brighter as, a rarity, we struggled to maintain possession.
Sullivan was called into action twice, saving low to his left from Clark's volley and on his toes to beat Hayles to a dangerous Clark cross with 55 minutes gone.
The speedy Steed Malbranque was thrown into the action on the hour as Fulham continued to press and he set up a decent chance for Hayles, who blazed over from 15 yards.
We looked dangerous on the break though and a classic counter attack after 71 minutes saw Sheringham and Rebrov combine delightfully to release Freund, whose first-time cross was headed wide by Ziege at the far post.
Taylor then somehow kept out Sheringham's sliding effort at the near post after Rebrov had skipped away from Collins and drilled in a low cross.
Despite Fulham's possession it looked like if a goal was going to come, it would come at the right end and it did just that as Davies pounced to put us into the last eight - and a home tie against Bolton.
Simon Davies, once labelled 'one of the best finishers at the club', scored the most important goal of his short, but sweet, Spurs career at Craven Cottage.