51�Թ�

Champions League, Premier League and full international appearances, along with current contract status at club level, all contribute to the ETV rating that Football Transfers give - and it is different to the market value players may be sold and bought for.

MacDonald said: "However, the ETV algorithm rates his future potential highly. Of course, quotes of £100m are completely silly, but we've got him valued as the 15th most valuable under-20 player in the world."

Champions League, Premier League and full international appearances, along with current contract status at club level, all contribute to the ETV rating that Football Transfers give to a player - and it is different to the market value players may be sold and bought for.

Although Sporting always command massive fees, he has less experience at a top level, so while he will likely be more expensive than his low ETV, it could be a deal they could get done.

The ETV of the latest Brighton midfielder off their production line is set to rise again significantly as he gains more experience at Premier League level.