When Henderson joined the club earlier this year, he signed on with De Godenzonen as one of their top earners. The same is the reason that Henderson could be forced to leave, as the Dutch club is going through financial issues having missed out on the Champions League for next season. The report suggests that the four-time European champions would prefer to keep Henderson at the club and make sales of other players but the sale of the former Liverpool star could be considered as a real possibility.