Klopp is reportedly considering bringing the Borussia Dortmund man to Anfield.
Stefan Johansen has just 12 months remaining on his contract at Celtic.
The rumoured Toffees target has been monitored by Tottenham Hotspur, Sunderland and Aston Villa, among others, a report claims.
The 24-year-old is set to be an important member for Rafael Benitez's team as they prepare for a season in the Championship.
The Turkish side have confirmed their interest in the Liverpool defender.
Leeds United would benefit greatly from having Steven Pienaar amongst their squad.
Cristiano Ronaldo scored one and created another as Portugal won 2-0 in Lyon.
Tjaronn Chery netted 10 goals for Queens Park Rangers last season.
Liverpool's first pre-season match takes place against Tranmere Rovers tomorrow night at Prenton Park.
The Wolverhampton man hailed the new Leeds United striker.