The pair both picked up gold medals by starring in Argentina's final victory over Nigeria in China four years ago and have expressed their love for the tournament, indicating that players this summer will experience a competition like no other.
Aguero told Fifa's official website: "I had never been to the Olympics and my team-mates who had been said it was something incredible.
"When it came to my turn, it was something unique, that you can only experience once. I was so pleased and especially because we could achieve the gold medal."
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Zabaleta, also a part of Argentina's gold-medal-winning side, enthused about the benefits of being in and around the athletes' village.
He explained: "When we go to play in any tournament, friendly matches, whatever, we always go in a very professional way, with the tools to work, good hotels, good food, everything is great.
"The difference with the Olympic Games is the amateur spirit. There you're in the same boat as all the other sportsmen, athletes from other disciplines - you have the same rooms, with six or eight in the same apartment with just one bathroom.
"You have to get a bus to go and eat; you're training in difficult places. This is the difference."
Argentina did not qualify for the Olympics this time around, with Brazil and Uruguay the only South American representatives.