Per the source, Riekerink sent a report to the board underlining his position on the transfer efforts and gave the transfer committee his full backing in pursuing the Brazilian midfielder.
Galatasaray are reported to have offered Lucas a deal worth €2.5 million per-season and Liverpool are understood to have given the midfielder the green light to leave.
Lucas is currently out injured for a month after picking up a hamstring strain but that has not put Galatasaray off trying to sign the 29-year-old.
The experienced midfielder would end a nine-year spell at the club if he were to part ways over the summer. Lucas has been closely linked with a move to Turkey in the past and almost joined Besiktas on loan last season until Brendan Rodgers blocked the move.