Sky Bet have suspended betting on Yohan Cabaye's next club after a significant run of bets on the Newcastle midfielder joining Monaco.
Punters begun backing the playmaker for a move to the big-spending French outfit on Friday evening amid reports that he had already undergone a medical in the principality.
The Ligue 2 champions were already considered 6/4 favourites to secure his services ahead of Manchester United, but were backed at as short as 2/5 before betting was suspended.
Sky Bet Football Trader Chris Spicer said: "It's difficult to say whether the money was coming from people in the know or just due to the reports, but the size of the stakes imply those backing are convinced a deal is set to happen.
"Monaco have been backed to sign a series of players this summer, with money coming for them to sign Patrice Evra and Nani, while they have already signed James Rodriguez and Radamel Falcao as they look to re-establish themselves as a major force with the financial backing of Russian billionaire Dmitri Rybolovlev."