The Argentine set up a semi-final clash with Milos Raonic by beating Philipp Kohlschreiber over three sets.
The winner will face either Federer or Borna Coric in Sunday’s final but the Swiss star is the heavy favourite to progress.
And it is likely Del Potro will meet the 36-year-old in the final but he claims that is what he wants.
The world No 8 says he is only focussed on his last-four tie but would love to play Federer in the final.
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Of course any chance to play with Roger would be great
“I’m not thinking about that,” Del Potro said.
“I just want to keep winning.
“It's good to me feel with this confidence when I getting to the court and I play well, but I'm going step by step.
“Of course any chance to play with Roger would be great.”
Del Potro has also admitted that he has made a number of changes to his game in order to try and get back to his best.
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“Well, I know I'm playing a different game than few years ago,” he added.
“I mix it up with the slice, dropshots. I try to come to the net more often than years ago.
“And I think I like the way I'm playing now. It's more funny to watch, also.
“And I improved on other things in my game as my volleys and slices, and I think I have a complete game at the moment, but I know how to do to improve that.”