The Junior Section decider could well be a repeat of this year's FA Cup finale after Premier League giants Chelsea and Everton were kept apart in last night's quarter-finals draw.
Chelsea came out of the hat alongside Watford after their second win as many days with a 4-3 victory over Maccabi Haifa.
John Swift and George Bowerman both landed a double for the Stamford Bridge outfit as they edged a seven goal thriller.
The only County team to make it through in the knockout stages was Raymond Campbell's Down boys.
He said: “It's a brilliant achievement, we've been together for the last 10 weeks and they've done everything we've asked of them.
“There's quality throughout the squad and the team spirit has been excellent from day one.
“It's no mean feat to win two games in two days.
“Club Pachuca are unknown opposition for us, but then again it will be the same for them too.”
Holders Everton are safely through and will face Swindon Town, after they also recorded a second straight victory, with a |1-0 win over Spartak Moscow.
Matthew Harris netted the only goal of a tight encounter at Rugby Avenue in Coleraine.
Fellow English outfit Swindon Town are also through after recording a 4-2 win over Maccabi Tel Aviv, also in Coleraine.
Alex Henshall was the hero for Town as he bagged himself a hat-trick, with Ben Whitehead completing the scoresheet.
There was drama off the pitch last night as Hull City and Armagh City were locked in an identical tie after Tuesday's results.
With nothing to separate the teams, the two managers met to see names drawn from the Junior trophy, with Hull coming out first as the lucky side. Armagh were 3-1 winners over AB Copenhagen in Limavady, with a Ciaron O'Hanlon brace and Shane McKinney strike doing the damage.
Hull also ran our 3-1 victors, this time against Club Necaxa at the Warren in Portstewart.
One club who dropped into the Slemish Trophy quarter-finals with a thud was the Football Academy of Jerusalem, who lost 7-0 against Plymouth Argyle in Castlerock - leaving their goal difference at minus 15 over the first two days.
By contrast that win helped Argyle to top the Junior Section and they will now face Hull City in the last eight, today.
Tuesday results: Co Armagh 3-1 AB Copenhagen, Co Fermanagh 0-0 Dundalk SL, Queen of the South 1-5 Co Antrim, Club Necaxa 1-3 Hull City, Club Pachuca 6-0 Co Londonderry, Everton 1-0 Spartak Moscow, Swindon Town 4-2 Maccabi Tel Aviv, The FAJ 0-7 Plymouth Argyle, Co Down 2-0 North Dublin SL, Co Tyrone 1-1 Donegal SL, Watford 4-0 AIK Stockholm, Chelsea 4-3 Maccabi Haifa.
Today's Milk Cup 1/4 finals fixtures: 5pm: Co Down v Club Pachuca (Coleraine University), Chelsea v Watford (Rugby Avenue, Coleraine), Hull City v Plymouth Argyle (Parker Avenue, Portrush). 6pm: Everton v Swindon Town (Coleraine Showgrounds).
Today's Slemish 1/4 finals: Noon: Co Armagh v Maccabi Tel Aviv (Roe Mill, Limavady), 1.30pm: Dundalk SL v Co. Londonderry (Castlerock), AIK Stockholm v Maccabi Haifa (Rugby Ave Stadium, Coleraine), AB Copenhagen v Co. Antrim (University, Coleraine)
Today's Dunluce 1/4 finals: Noon: Spartak Moscow v Club Necaxa (Warren, Portstewart), Co.Tyrone v North Dublin SL (Riada 2, Ballymoney), Donegal SL v Co. Fermanagh (Broughshane), FA Jerusalem v Queen of the South (Anderson Park, Coleraine)