They have been trying to sign the player for a while now. Negotiations are currently advanced and personal terms are close to being agreed as well. 

Newcastle will look to develop him into a first-team star over the next few years. The Magpies have done well to develop young players like Longstaff and they will be hoping to do the same with Sissako now.

It will be interesting to see if the two clubs can finalise the agreement in the coming days now.