Per the source, Lucas is set to earn €15,000 per-match up to 30 games which would give him a €400,000 extra on top of his salary.
Lucas who is currently out injured for a month with a hamstring strain would of course have to stay fit if were to get a hold of his maximum bonus.
The 29-year-old midfielder did make 40 appearances for the Reds in all competitions last season and has spent nine-season at the club making him the longest serving member of the squad.
Galatasaray sporting direcotr Leven Nazifoglu revealed yesterday that nobody should be surprised if Lucas ends up being signed.
Nazifoglu was a guest on Turkish sports radio station Radyospor when he underlined that the deal could go ahead.
“If Lucas Leiva puts pen to paper on a deal for Galatasaray it would not be a surprise to be honest,” Nazifoglu said.
The Istanbul giants have given football agent Ahmet Bulut a mandate to hold negotiations between the club and player on behalf of the club. Bulut represents Arda Turan and has close ties with the Gestifute player management company headed by Jorge Mendss.