Porto are moving for West Ham striker Enner Valencia.
The Sun says Valencia could be set for a switch to Porto after struggling to make it with the Hammers.
The Ecuadorian striker spent last season on-loan with Everton.
The 27-year-old flopped, starting just five games, and it was no surprise when Toffees boss Ronald Koeman declined on a £14million permanent deal this summer.
Along with Porto, Besiktas are also monitoring the situation, and the possibility of a lucrative contract and Champions League football next season could tempt Valencia to snub Porto and move to the Super Lig.