Bayern will again be challenging for glory in both the Bundesliga and the UEFA Champions League over the coming 12 months, and Heynckes feels he needs greater competition for places.
"You need to read these statements (from Martinez) right. The transfer fee is exorbitant, this is the main problem," Heynckes told Bild.
"Still, it's a fact he is a part of our plans.
"Our club, Bayern Munich, will again have to juggle many balls in the new season. Therefore we need to rely on many good players.
"We need to have good alternatives, as we did not have these options in terms of players last season."