Chelsea would need to sell an established winger to satisfy Callum Hudson-Odoi's wishes, says Maurizio Sarri

Who is he referring to because the only out-and-out winger we have, is Hudson-Odoi?
Neither Pedro or Willian are what I would call wingers because they very rarely go past a defender on the outside and get crosses in.
I would love to hear Sarri’s definition of a winger.