Sariska may end up taking on the cream of Europe in the Qatar Prix de l'Arc de Triomphe in October should she complete an Oaks treble with victory at the Curragh and York during the peak of the summer.The filly provided Michael Bell with his second Classic success when narrowly denying Midday in the Investec Oaks at Epsom, and the pair will again do battle in the Darley-sponsored Irish equivalent on Sunday week.Should she add that race to her haul and go on to capture the Yorkshire Oaks, then Bell is keen to pitch her against colts and older horses at Longchamp.He said: "If she wins in Ireland and at York then the Arc will be on the agenda."Zarkava became the first filly since Urban Sea in 1993 to win the Arc last autumn, a feat Sariska may try to emulate, but Bell's immediate thoughts are on the Curragh Classic in a little over a week's time."She is going to go to Ireland where Midday will take us on again, and there are some other nice fillies about and that will make it tough," said Bell."She galloped to the line at Epsom and we will see if she gets the mile and a half at the Curragh. There are not many chinks in her armour and both her dam and her sister stayed further."