Feyenoord want to take Inter Milan signing Castaignos back on-loan
The teen is moving to Inter at the end of this season, but Van Geel hopes to bring him back to Feyenoord on-loan.
"I understand now he would rather stay at Inter to compete with Diego Milito and Samuel Eto'o but in the summer when he discovers that he might not get the chance to play he might consider things," said Van Geel.
"I think it is a serious option for him. Playing here next season will help his development. He is only 18, you know."