Mexican striker Raul Jimenez appeared to be on the verge of swapping Atletico Madrid for West Ham United in the summer of 2015.
The Brazilian, owned by Benfica but on loan at Besiktas, was the subject of £20 million bids from both Wolves and Liverpool last summer.
The Dutch youth international has struggled to establish himself in Portugal.
Tottenham Hotspur, Arsenal and Manchester United are reportedly interested in Benfica-owned Vitoria Setubal youngster Joao Carvalho.
The 23-year-old looks likely to be on the move this summer with Tottenham and Liverpool just two of many clubs linked.
The highly talented 20-year-old has not featured once for Forest's caretaker boss.
The Benfica winger may have stalled thanks to an horrendous injury but Celtic scouts watched him in action against Dortmund.
The Colombian maverick was reportedly wanted at St James' two years ago; but Newcastle United may not have been too impressed by his performance.
The Greek international struggled to make any impact at Craven Cottage.
Manchester United have opted against making a move for the Benfica defender Victor Lindelof after José Mourinho decided he is satisfied with his defensive options despite the prospect of losing Eric Bailly for up to six weeks due to the Africa Cup of Nations.