Sanogo has managed just three first team appearances for Ajax since arriving from the Gunners.
Sanogo's inability to secure a first team spot has prompted Zivkovic, who was loaned out to Willem II to make room for the Frenchman's arrival, to make the assertion he the better player of the two.
"Am I better than Sanogo? Yes!," Zivkovic told ELF Voetbal.
"I was already gone when Sanogo came in. But then Kolbeinn Soghtorsson left.
"I wanted to compete with 'Arek' Milik for the first striker position. I did not want to be a second striker with no prospect of being a first striker."
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