Kieft feels Gravenburch's career has stalled since joining Liverpool from Bayern Munich last summer.
He wrote for De Telegraaf: "Gravenberch is a different story. Trained by Ajax and moved to Liverpool after a difficult Bayern Munich season. It is a bit of an eternal story that everything that comes from Ajax must be good.
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In recent years, quite a few questions have been raised about that idea when you see that quite a few players have lost track after Ajax.
Arguments such as 'the train may only pass by once' and 'financially it is difficult to refuse the offer' are understandable, but look at the sporting future of such a young, talented player. If you can't break through at Bayern Munich, why would you succeed if you move to Liverpool?"