Sporting CP coach Ruben Amorim insists Viktor Gyokeres isn't for sale in January.

However, he accepts Sporting will be powerless should an interested club pay the Swede's €100m buyout clause.

Chelsea will have scouts in the stands tonight to watch Gyokeres against Porto.

Aware of the transfer rumours, Amorim fired a warning at Chelsea and anyother suitor.

He stated before the game: "He will only leave if someone pays the buyout clause in January."