It dawned on me recently, and I am quite surprised no one else has mentioned this, that if Torres leaves we will have no Striker for our Europa Campaign. Suarez is cup tied since Ajax are now participating in the knock-out stages of the competition and with the sale of Babel, we will be limited with only N'gog upfront...
From
http://en.wikipedia.org/wiki/Cup-tied"However, if the first club fielded him in the Champions League, but would later play in the UEFA Cup through finishing third in the group stage, the transferred player is ineligible to play in the UEFA Cup."