Mezue ahịrịokwu na-esonụ: Na 2009 World Championships na Rome, Pellegrini mebiri ihe ndekọ ụwa ọzọ na 400 m freestyle na oge nke 3:59.15, na-emeri nrite ọlaedo ma na-eme nke a na-aghọ onye mbụ na-egwu mmiri nwanyị iji mebie ihe mgbochi 4-nkeji na ihe omume ahụ; o meriri nrite ọlaedo na 200 m freestyle ma mebie ndekọ ụwa nke ya na oge nke 1:52.98. Na
2009 European Short Course Championship na Istanbul ọ mebiri ndekọ ụwa na 200 m freestyle na oge nke 1: 51.17. Na 2010 European Championship na Budapest Pellegrini meriri ọla nchara na 800 m freestyle, n'azụ Lotte Friis na Ophélie-Cyrielle Etienne, na ọla edo na 200 m freestyle na oge nke 1: 55.45; n'otu afọ ahụ, o kwupụtara na ya ga-arụ ọrụ na Laure Manadou bụbu onye nchịkwa, Philippe Lucas.