Bologna defender Cesare Natali is facing up to six months on the sidelines after damaging his knee against former club Fiorentina on Sunday. A statement issued on Bologna\'s official website confirmed the 33-year-old will require surgery after damaging ligaments in his right knee during his return to the Stadio Artemio Franchi - a game which his team lost 1-0. Natali signed a two-year contract with the Rossoblu this summer after spending three years with the Tuscan giants. From Fifa