Argentina come into the match looking for their first win over the All Blacks. In 26 previous encounters, the All Blacks have won 25 times, while in their second fixture the teams played out a 21-21 draw - in 1985.
However, the Pumas come into the match with the confidence from beating South Africa last time out for just the third time. In their two matches of the Rugby Championship, the Pumas have looked strong on both sides of the ball - maintaining an even points differential.
A key aspect of their play has been ball retention, which Ledesma said is critical if his side are to get a result tonight.
"If you give the ball to the All Blacks you know what's going to happen. But it's not only keeping the ball, but if you kick the ball, contest the ball, put pressure on them knowing what you're doing and why you're doing that, obviously a big one on Saturday will be turnovers.
"We want to keep the ball against them."