Dineen was forced out of Roscommon’s Connacht championship clash with Galway last month and an X-ray revealed a broken a bone in his ankle.
He is in now danger of missing the rest of the championship.
John Dunning, who took over from Dineen against Galway, is the red-hot favourite to get the nod to start, but Ray Cox and John White, both troubled by hamstring injuries, are unlikely to have their names pencilled into the Roscommon team-sheet.
Cork are due to select their team tonight but speculation is rife that the selectors could make changes in defence with Graham Canty taking over the full-back berth and Anthony Lynch moving to centre back.
Nicholas Murphy could team up with Maurice McCarthy at midfield while Jim O’Donoghue is in the frame for a place at left half forward.
Brendan Jer O’Sullivan, struggling to overcome the effects of a leg injury he sustained during last Sunday’s challenge game against Wexford, will play on the forty if passed fit, with Alan Cronin, Michael O Croinin and Colin Corkery filling the positions in the full forward line.
Westmeath have announced an unchanged side for their Leinster quarter-final replay with Meath but the Royals could be without team captain Darren Fay and fellow defender Mark O’Reilly.
Fay sustained a back injury in last Sunday’s enthralling drawn encounter, while O’Reilly received a blow in the face.
As a result manager Sean Boylan has delayed selection of his side until later in the week but reports yesterday indicated that both Fay and O’Reilly could be on the missing list.
Donegal will be without Brendan Devanney for their All-Ireland qualifier against Longford on Saturday.
Devanney damaged a lateral ligament in last weekend’s defeat by Fermanagh and will be out of action for several weeks as a result.
However, Christy Toye, who missed the Fermanagh game because of a leg injury, is expected to be back in business on this occasion.
John McBride has been ruled out of the Derry team for their All-Ireland qualifier against Wexford.
The talented wing back sustained a hamstring injury during the Ulster championship replay with Tyrone and has been unable to train since.
But on a brighter note Danny Murray, who was concussed during a club game last weekend, is expected to get the all-clear to play.
Longford who face a 140-mile trip to Ballybofey to play Donegal could be without full back Cathal Conefrey.
He went into the game against Kildare with an ankle injury and only lasted 20 minutes.
John O’Callaghan, Jamsie Martin and Fintan Coyle also picked up injuries in the same game, but are expected to recover. Longford will pick their team tonight.
Waterford coach Denis Walsh has named the same team which failed to beat Tipperary in the Munster championship, for the All-Ireland qualifier against champions Armagh in Walsh Park on Sunday (2pm).
Meanwhile, there is growing concern about the availability of star Limerick midfielder John Quane for Sunday week’s Munster senior football championship semi-final against Clare, at Ennis.
He was unable to line out with his club Galtee Gaels at the weekend because of a leg injury picked up in a recent challenge match.
With Jason Stokes already ruled out, Quane’s absence would be another major blow to Limerick’s prospects of making it through to the final.
WESTMEATH (SF V MEATH): A Lennon; P Rouse, D Gavin, F Murray; B Morley, D Healy, D Heavin; R O’Connell, M Flanagan; F Wilson, S Colleary, J Fallon; J P Casey, G Dolan, D Dolan.
WATERFORD (SF v Armagh): P Houlihan; M Crotty, G Hayes, J O’Reilly; E Rockett, T Dunphy, S Briggs; K O’Keeffe, A Hubbart; G Hurney, C Power, J Coffey; J Ahearne, J Hennessy, M Power.