Things change in the blink of an eye in football. The Football Whispers Index takes the latest transfer rumours and gives them a score out of five; the higher the score, the more realistic and reliable the whisper.
Here are today's top five emerging whispers. And keep an eye on Transfer Talk for all the latest gossip.
Tolgay Arslan to Newcastle United
Bayer Leverkusen and Borussia Dortmund are interested in bringing Besiktas midfielder Arslan to Germany. But they aren't the only clubs vying for his signature. Turkish outlet Haberler claim Newcastle are long-term admirers of the 27-year-old and suggest Rafael Benitez sees the former Dortmund academy player as an upgrade on the midfielders he has at his disposal. Besiktas are believed to be open to the idea of selling Arslan for the right price.
Anthony Martial to Juventus
Pavel Nedved was spotted meeting Martial's agent in a London hotel ahead of Juventus' Champions League match with Tottenham on Wednesday evening. The France international has just 16 months remaining on his deal with Manchester United and though the club want to tie him down to a longer contract, he's reluctant to do so following the arrival of Alexis Sanchez. The 22-year-old could force United into cashing in on him when the window reopens.
Ibrahim Amadou to West Ham United
According to reports in Le10Sport, West Ham are going to rival Crystal Palace and Brighton for the signature of Lille centre-back Amadou. The 24-year-old made the trip to London on deadline day in an attempt to force through a move to Palace but a deal couldn't be struck and he returned back to France disappointed. West Ham are prepared to meet Lille's £16 million valuation of the player and this puts them ahead of their rivals.
Iker Casillas to Newcastle United
The Porto goalkeeper is leaving the club at the end of the season and according to the Chronicle, could head to the Premier League to join Newcastle United. Rafael Benitez is still in the market for a stopper despite January loan signing Martin Dubravka impressing. They were recently linked with a move for Pepe Reina but the former Liverpool man appears to have settled on a switch to AC Milan. Casillas is viewed as an experienced professional who could help others improve their game and a short-term move to Newcastle could be beneficial for all parties involved.
Simon Mignolet to Napoli
Belgian outlet DH have revealed Simon Mignolet is looking to move elsewhere after losing his place as Liverpool's first-choice goalkeeper to Loris Karius. The 30-year-old Belgian has changed his agent in an attempt to quicken the process and isn't happy with Jurgen Klopp's decision to relegate him to the bench. Napoli are believed to be interested in the former Sunderland man with current No.1 Reina expected to swap Naples for Milan in the summer.