Sarries suffered a 20-16 defeat to Saints at the Gardens on Saturday, with James Wilson scoring once and Samu Manoa twice to secure a home win.
That result gives Jim Mallinder’s men home advantage when the two teams meet in the final four clash on the second weekend of March.
But Sorrell isn’t fazed by that prospect, instead feeling it’s a great chance for his men to make amends for what happened on Saturday.
“We’re glad that we’re coming back here (in the semi-finals) because we’ll get the chance to right some wrong,” he said.
“We feel we didn’t put in our best performance today but fair play to Northampton - they put us under pressure and came out on the right side of the result.
“It gives us an opportunity to come back and do something we didn’t do here on Saturday.”
Saracens had been leading with 15 minutes to go after scrum-half Ben Spencer took his personal points tally to 16.
But Saints were just a point behind and went on to secure the victory through Manoa’s storming score.
“We had some good opportunities in the first half,” said Sorrell. “We had some attacking lineouts.
“It was difficult with the wind to get good field position, but we had some opportunities and got a try through Ben before half-time and went in 10-7 up.
“It was positive at half-time but they managed to get their try after half-time and we worked our way back in.
“We had the lead, but it’s just frustrating that we couldn’t hold out there at the end.”