 Caballero scored his fourth league goal in a 2–0 away victory against Aberdeen on 7 April.On 4 May 2001, it was reported by BBC Sport that Caballero had signed a new deal which would keep him at the club for the following three seasons.The club had paid an undisclosed fee to Paraguay's Club Sol de América to make Caballero's loan deal permanent and that the sum was significant enough to top the club record of £300,000 paid for Javier Artero.