Barcelona ace Ronaldinho will need to find a new number once he completes his move to AC Milan.
Clarence Seedorf smiled: "All players have a favourite number and they will always try to get it wherever they go.
"But really, if there is particular need or superstition, we can talk."
However, Milan vice-president Adriano Galliani has reassured Seedorf: "The No10 stays with Seedorf next season."