Non-league Bluebell United were the toast of the FAI Ford Cup third round as they frustrated holders Derry City to earn a 0-0 draw at the Brandywell.
Having conceded home advantage, Leinster Senior League side Bluebell must return to Derry for the replay on Tuesday night.
Derry had the best chance of the first half with Bluebell 'keeper Andy McNulty tipping over from Rory Paterson's 35-yard free kick.
Fellow striker David McDaid wasted Derry's best opening in the second half when heading over the top from Mark Griffin's cross before Michael Duffy flashed a shot inches wide from just yards out in stoppage time.
St. Patrick's Athletic, last year's beaten finalists, cruised through to the quarter-finals after a 3-0 win at Bray Wanderers in an all-Premier Division clash at the Carlisle Grounds.
Greg Bolger put the Premier Division leaders ahead on 18 minutes when blasting home from close range.
In-form winger Conan Byrne doubled the lead just past the hour mark with a powerful shot following a swift counterattack. Killian Brennan sealed Saints' passage with a penalty on 67 minutes.
Dundalk maintained their great form with a 5-3 victory over Limerick in the game of the night at Oriel Park.
Skipper Stephen O'Donnell put Dundalk ahead form a sixth-minute penalty after topscorer Patrick Hoban had been upended in the area by Robbie Williams.
Axel Bossekota levelled for Limerick with a 16th minute header from a Dave O'Leary free kick. But Dundalk led 3-1 at the break with a stunning 22nd minute strike from Richie Towell and a third from Kurtis Byrne.
Winger Darren Meenan made it 4-1 on 58 minutes before Rory Gaffney got a second goal back for Limerick six minutes later.
Byrne added his second of the night to make it 5-2 minutes later to all but clinch the win.
Gaffney got another goal back for Limerick on 75 minutes before being sent off for a second yellow card offence two minutes later when he handled the ball into the net.
As expected, Shamrock Rovers had too much for FAI Junior Cup holders Sheriff YC as they eased through with a 3-1 win at Tallaght Stadium.
Rovers never looked back once Tommy Stewart scored from close range following good work by both full-backs Conor Powell and Conor McCormack.
Powell was again involved in Rovers' second goal on 21 minutes with Mark Quigley's audacious flick putting skipper Shane Robinson in to score.
Sheriff were thrown a lifeline on 56 minutes when John Lester's sublime cross was headed home by John Rock.
But Quigley confirmed record-winners' Rovers' passage through to the last eight with a penalty on 65 minutes after Karl Sheppard had been fouled by Sheriff 'keeper Austin O'Neill.
A fifth minute goal from Dean Kelly saw Shelbourne labour to a 1-0 win over Cork non-league side College Corinthians at Tolka Park. Kelly, who scored twice in their win over Bandon in the last round, headed home from a Sean Brennan corner after five minutes.
Skipper John Meade hit a stoppage time equaliser to earn Cobh Ramblers a replay as they stunned fellow First Division strugglers Finn Harps in a 1-1 draw at Ballybofey.
Harps had the start they'd have wanted with the lead goal from veteran Kevin McHugh on seven minutes.
But with the clock well into added time at the finish, defender Meade stepped up to fire past Ciaran Gallagher and bring the tie back to St. Colman's Park on Monday night.