With Roger Federer and Rafael Nadal having fallen early, many have considered it a foregone conclusion that the final will be contested by Novak Djokovic and Andy Murray.
As a result the search has been on to find a pretender capable of stepping up to the mark, and powerful Polish player Janowicz did his best to show he could be the one as he defeated a seed at grand slam for the first time in his career.
The 22-year-old sent down 30 aces as Almagro was put to the sword 7-6 (8/6) 6-3 6-4, but the Lodz native was keen to keep a lid on expectations afterwards.
"The only way for me is to look after my game," he said.
"I will take care of myself, have a few hours off and think about the next match."
That will come against Jurgen Melzer on Monday in Janowicz's first ever fourth-round appointment at a grand slam.
"He's a great player but right now I am playing some really good tennis," Janowicz added. "I am so happy."
After Murray - seeded second - Almagro had been the highest-ranked player left in the bottom half of the draw at 15th.
After Murray - seeded second - Almagro had been the highest-ranked player left in the bottom half of the draw. That status now belongs to 20th seed Mikhail Youzhny, whose clash with Viktor Troicki was a victim of the wet weather.