Tottenham Hotspur midfielder Alex Pritchard has been linked with a move to Leeds United.
West Ham United have been linked with Deportivo La Coruna hitman Lucas Perez.
Brendan Rodgers' side take on the Khazakhstan team in the Champions League on Wednesday.
Tottenham Hotspur are currently on tour in Australia and face games against Juventus and Atletico Madrid over the next few days.
Leicester City and Celtic recently met in the International Champions Cup.
Deulofeu impressed up front for the Toffees in the 3-0 win over Barnsley on Saturday.
Liverpool signed Georginio Wijnaldum from Newcastle United last week.
Vincent Janssen was signed by Tottenham Hotspur to cover Harry Kane, but is it enough?
The Red Devils midfielder says the China tour has been a good bonding exercise.
Barton joined the Gers on a free transfer this summer and looks set to be a key figure at Ibrox this season.