Sorry didn't answer that before, Sivori used to lean left in way Maradona and Zidane lean on to the left side, he wasn't a left winger or even a left side forward he always played more or less like a modern second striker or Attacking midfielder. Dzajic on the other hand is an out and out wing forward, who while sometimes score goals by cutting in like Czibor or Giggs but he wasn't a player who would mostly play on the inside left ala C. Ronaldo, Blokhin etc. I can't see any overlaps or problems between them.