Lotito is wary of hurting team spirit by paying one player far more than the rest of the squad.
"There are many names we are looking at," he told reporters. "But we are aware that we have players in that position that are already competitive.
"However, should we go for a new midfielder, he would have to fit in with the economic structure we have at the club.
"The dressing room has its own balance, and we have no intention of altering that."