O' Shea said: "We have a triple task of league, Cup and Europe. Now we have to concentrate on Gloucester." Six English clubs have reached the last eight of the Parker Pen Shield and the Irish are the only one of them who will have to leave the country to try to make the semi-finals.
The quarter-final draw for the matches which will be be played on the weekend of the 26-27 January is: Saracens v Pontypridd, Pau v London Irish, Gloucester v Ebbw Vale, Sale v Bristol.
In the Heineken European Cup quarter finals on the same weekend, holders Leicester and former winners Bath are both at home.
The draw is: Leicester v Leinster, Bath v Llanelli, Stade Francais v Munster, Castres v Montferrand.