Lucas has backed the move, believing his fellow Brazilian can change the path to fortune for the Reds.
"I am not aware of anything in terms of Ronaldinho signing, but I would be very happy if this was to happen," Lucas told Globoesporte.
"We started a friendship when we played in the Olympics and for Brazil. It would be nice to play with him at Liverpool.
"Everyone knows Ronaldinho and they know what he can do."