Gifford went close from a free-kick after the interval and Milligan produced further heroics with a brilliant one-handed save to keep out the same player after he had linked superbly with Pattenden.
Norfolk sub Karol Wengrzik almost sealed things late on with proved to be the final chance of the contest as Sussex’s quest for a second Youth Cup win was ultimately put on hold for another year.
Jay Lovett said: “This was a difficult game against the defending champions; they’re a very good side both with the ball and with their organisational tactics.
“They are physical, strong and hard to break down. Their long throw in caused us problems to start but once we dealt with that I felt we managed to keep them quiet mostly. I’m not fuming with the performance, it wasn’t a case of us not turning up but I cannot be completely satisfied as I felt we didn’t do enough.
“Their keeper made two very good saves in the second half, we put them under a bit of pressure but overall a tight game settled by a bit of quality.
“Liam (Brady) did very well when he came on, Dylan (Gifford) and Josh Gould also impressed met, there were some good performances but it’s always disappointing to go out of a tournament. I wish Norfolk all the best in the next round.”
(A selection of photographs can be found on Facebook - courtesy of Simon Roe Photography)
Stats: (Sussex - Norfolk)
Goals: 0-1; Shots: 13- 9; Shots-on-target: 7-5; Corners: 4-3; Off-sides: 1-3; Fouls: 11-13; Yellow cards: 2-1; Red Cards: 0-0.
Sussex: Bromage; Bromage, Harper, Beresford, Mthunzi, Jelly, Blackmore (c), Gifford, Goldsmith, Waters, Pattenden, Pittock.
Subs: Gould, Brady, Rawlingson, Seymour.
Norfolk: Milligan; Milligan, Tinkler, Philpott, Johnson (c), Ford, Rich, Wing, Murphy, Bemrose, Forbes, Watts.
Subs: Lane, Upston, Lane, Gilding-Hewitt, Wengrzik.
Match report by Jamie Spoor.