Derry v Clare - Saturday, 3.45pm at Croke Park
Derry are the form team after recording big wins over Tyrone, Monaghan and Donegal in the Ulster Championship.
They are very structured under Rory Gallagher.
Clare manager Colm Collins isn't the sort to go around taking bites out of stone walls either.
They had a great win over Roscommon at Croke Park last time out.
Clare are fit and motivated, but Derry have been operating at a higher level in the league and they beat Clare on a 2-13 to 0-10 scoreline in a previous league match.
All known form points to a Derry victory.
Dublin v Cork, Saturday, 6pm at Croke Park
The most lopsided of the quarter-finals, this year Dublin seem to think they should have their matches over by half-time.
There's no doubt Cork have improved under John Cleary. They put up a great struggle for much of the game against Kerry, and against Limerick they fought hard for a tight win.
Even though both teams will be operating in Division 2 next year, Dublin are a ruthless bunch and they'll be eyeing that semi-final place.
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Galway v Armagh, Sunday, 1.45pm at Croke Park
Evenly matched, the clash of Galway and Armagh promises to be the game of the weekend.
Armagh are the real form team coming in after big wins over both Tyrone and Donegal. The latter game showcased an exciting brand of football that will attract the neutrals.
Galway were a bit similar, with their gung-ho wins, but they had a very structured defensive pattern in place in their Connacht final win over Roscommon.
I think Armagh may have the edge here.
Kerry v Mayo, Sunday, 4pm at Croke Park
Everyone is wondering what Mayo can bring to the table here.
Kerry have set out their stall from early in the year, being ruthless in games and running up big scores, more like you'd see in a hurling match.
People will be wondering if mayo can stave them off, particularly as Mayo suffered a 3-19 to 0-13 hammering at the hands of the Kingdom in the league final, and with doubts over the participation of Ryan O'Donoghue.
Hopefully O'Donoghue and David Clifford will play, but it would appear a tall order for Mayo.
People look at them to bring something special into big games, but it would need to be very, very special to upset Kerry.
Colm O'Rourke was speaking on RTÉ Radio 1's Morning Ireland.
Follow the All-Ireland Football Championship quarter-finals on Sunday, Galway v Armagh (1.45pm) and Kerry v Mayo (4pm), via our live blog on rte.ie/sport or on the RTÉ News app. Watch live coverage on RTÉ2 and RTÉ Player commencing at 1.15pm with live radio commentary on RTÉ Radio 1.
Follow the All-Ireland Football Championship quarter-finals on Saturday, Derry v Clare (3.45pm) and Dublin v Cork (6pm), via our live blog on rte.ie/sport or on the RTÉ News app. Listen to live radio commentary on RTÉ Radio 1.