Arsenal former player and legend Paul Merson said on Sunday that he think Sadio Mane or Mohamed Salah will leave Liverpool by the end of the season.
"Liverpool will choose to cash in on either Mohamed Salah or Sadio Mane following the arrival of Luis Diaz," Merson said.
He added, however, that the club should 'splash the cash' to keep Salah and Mane.
"I don't think they would have seen this coming, they got Jota before that. I think Diaz has come in as the insurance policy," the Arsenal legend said live on Sky Sports.
"Looking at Diaz I think they got him quite cheaply if I'm being honest – if [Porto] knew that either Mane or Salah is going to leave they'd have put another £20m on his fee.
"One of them will be leaving. I don't think Liverpool will be giving £300-400k per week to both of them.