Many South Sydney players might like to erase their most recent NRL loss to Melbourne from their memory bank, but it's no problem for Dylan Farrell.

Farrell suffered a heavy concussion midway through the second half of the Storm's 26-8 win over the Rabbitohs on August 9, the previous meeting of the two sides that will square off on Friday night for a preliminary final berth.

The 22-year-old was knocked off course while going up for a bomb at AAMI Park, resulting in his head smacking into the knee of teammate Andrew Everingham.

In his post-match press conference, Souths coach Michael Maguire questioned why play wasn't stopped at the time and why his side weren't awarded a penalty for Farrell being "taken out".

Farrell said this week he bears no ill will towards the Storm - his memory far too foggy to know what exactly happened in the contest that left him so dazed.

Instead there's more a feeling of unfinished business, with the St George Illawarra-bound winger keen to find the tryline against Melbourne instead of exiting the field on a stretcher and in a neck brace.

"I think it was the 60th minute, so it would have been good to play the last 20," Farrell said ahead of Friday night's ANZ Stadium clash.

"Ben Teo's try (in the first half), that's probably the only thing I remember. The rest of it is a bit of a blur to be honest."

Farrell didn't need reminding of the threat posed by the Storm, who have won 14 of their past 15 matches against the Rabbitohs.

"I know they're a quality team that always turns up against us," he said.

"We've got to work together if we want to win. If we don't do that, they will put some points on us.

"The football steps up now, I've just got to work harder."