(ANSA) - Milan, August 27 - Roubinho has added to AC Milan coach Massimiliano Allegri's injury headaches after picking up a thigh injury in Sunday's 1-0 home defeat to Sampdoria. Club doctors said Monday the Brazilian striker would definitely miss Milan's next outing at Bologna. The full extent of the injury has yet to be established. Milan are already without fellow Brazilian forward Pato for a month. New signing Giampaolo Pazzini came on in the second half against Samp but failed to make an impact.