Moussa Dembele impressed a lot of people for Fulham last season. He gave them attacking flair which Fulham have missed for years. The tricky Belgian has close control and a shooting ability in his locker. Jol will be keen to keep Dembele but with interest coming from Spain, he'll find it very hard to.
Although at this stage they are just rumours, Dembele would be a perfect fit for La Liga. If these reports have some substance, Mourinho may have to sell to find room for the Belgian. As we know Moussa Dembele can play as a lone striker and on the wing. But he is best suited in the hole, supporting the striker. So to get the best out of Dembele, Mourinho would have to sell someone such as Kaka.
It seems absurd that one would sell Kaka, the Brazilian maestro, for Fulham's Moussa Dembele. However Kaka's life at Madrid has been an unhappy one. Not forgetting the constant link between the Brazilian and AC Milan. However Madrid are lacking wingers at this moment of time. Dembele may not be suited as well on the wing but he cuts inside wonderfully, weaving in and out of defenders.
Fulham will certainly miss Dembele if he joins Madrid but this will almost certainly not happen if Clint Dempsey moves on. Jol will definitely not sell Dembele and Dempsey. It's going to be one or the other if any.
I suppose we can't look into any rumours in much depth as hundreds of them are created every day. However with most rumours there is always some truth behind them. We'll have to wait and see if the Special One makes a solid move for the Belgian.