The Argentine will be in the squad for his country during this summer's Copa America in the United States.
However, he did not finish out the club season, which has led to some fans questioning his priorities.
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"I needed to get this surgery since I been dragging the pain for about six months," stated the Chelsea midfielder.
"It was something I could avoid while constantly treating myself with injections and medications.
"But a few weeks ago, the pain started to get more and more intense, without any of this taking effect, and it was worse as I trained and played annoyingly, but I didn't want to stop being in the games I had."