"Gio wanted to move but we couldn't let him go," said Redknapp.
"We had a £13m offer from Udinese with £10m down and the rest in do-able bonuses with a big sell-on, but he wouldn't go.
"He wanted to go to Seville who were offering around £3m. You can't blame the chairman for not letting him go. Gio is a talent with a big part to play.
"Only him and Luka are here now out of the lads who wanted to leave."