Romeo Lavia
The Belgian has a reported price tag of £50m, so he would be significantly cheaper than Caicedo.
Co-Director of Recruitment and Talent Joe Shields is a big advocate of Lavia, having worked with him at Manchester City and having brought the player to Southampton last summer.
With that in mind, it seems likely that the 19-year-old would be the main alternative to Caicedo, if talks about signing the Ecuadorian collapse.
However, if recent reports are to be believed, Chelsea are in danger of losing out on the midfielder, with Liverpool said to be stepping up their efforts to sign him.
