SYDNEY Swans ruckman Shane Mumford felt he'd been letting his teammates down and struggling to produce his best form midway through the 2011 season.

But it's fair to say the performances the 25-year-old has put in over the past month have more than made up for that dip in form.

Plenty was expected of Mumford heading into this season after an impressive debut year in Sydney that led to a runner-up finish in the club's best and fairest award behind Kieren Jack.

But an ongoing knee problem that required surgery during the pre-season was affecting him mentally and preventing him from displaying his best football.

In the past four weeks, however, Mumford has been in career-best form, averaging more than 38 hit-outs, 16 disposals, 113 Dream Team points and just under a goal a game.

The Swans suffered a disappointing loss to Richmond during that streak, but also knocked off Geelong and St Kilda to sew up a finals berth, as well as a one-point loss to Essendon.

"It was about time I started playing some good footy after a bit of a slump through the mid-year," he said on Tuesday.

"I've been doing a lot of extras around the club with my hands and stuff like that.

"In the midfield we've got a really good combination between myself and Josh Kennedy and Adam Goodes, now that he's come in.

"It seems that half my hit-outs to advantage go to one of those two, so I probably should thank them for my form a little bit.

"It plays with your head a little bit mentally when your body's not quite feeling right, you're going half as hard as you should be.

"So I had to get it into my head that my knee's right to go and now that I have I'm starting to play good footy."

Former Cat Mumford took particular pleasure from the victory over Geelong, with the Swans ending the home side's four-year winning streak at Skilled Stadium.

"That was amazing," he said.

"To be able to go down there and do something nobody's been able to do for so many years was a massive thing.

"After the game it was good to be able to come off shaking their hands as the winning side rather than the losing side for once."

The Swans could earn a home final this weekend, but Mumford doesn't mind where they play in week one of the finals, saying they only need to make sure they have the right frame of mind.

He was also asked about the possibility of the Swans recruiting Brendan Fevola for next season after the former Carlton star's strong recent form in the VFL.

But Mumford believes the Swans already have the pieces in place to enjoy success in the near future.

"I guess that's up to the coaches, but we've got blokes down there like Sam Reid, who is developing into a really good forward," he said.

"(Fevola's) kicking goals, but he's never really had too much trouble kicking goals, it's always been the off-field stuff that's held him back.

"Hopefully he can turn that around and get the second shot somewhere."