On Sunday the South Tipp club will have home advantage when they take on the Sligo side in the quarter-finals of the FAI Junior Cup.
O'Shea's Celtic were knocked out of the Munster Junior Cup at the quarter-final stage when they lost to Newmarket by three goals to one in February.
But he says it meant his side could focus on the Sunday's match-up.
That game kicks-off at 2 o'clock on Sunday at the same time reigning champions St Michaels are away to Sherrif YC in their quarter-final decider.
