JUST two weeks after injuring a knee, St Kilda captain Nick Riewoldt expects to be sidelined for only one more week.

Riewoldt, originally expected to miss up to eight weeks with a medial ligament injury, said he was already running well and hoped to miss just three games in total, taking into account the Hall of Fame weekend break.

The forward, who believes his side is being let down by poor skill execution, was injured in round seven against Richmond as he was slung in a tackle by Tiger defender Luke McGuane.

"I'm hoping to miss only one more game and I'm sure that's what will happen. It's a much better prognosis than was first thought," Riewoldt said.

"I'm yet to really test it with change of direction stuff, and that will be the challenge with an injury like this, but so far so good and I'm on track. Provided I can increase the workload this week, I should be back really soon."

Riewoldt said he was satisfied with how the team fought against Collingwood on Friday — the game was tight throughout, and the Saints could have pinched the lead late had Stephen Milne not missed a long set shot — but added that skill errors at crucial times let it down.

The loss left the Saints on four wins and four losses. The team makes a trip to Brisbane to play the Lions this weekend.

"… This was a game we could have won, and we've got to start winning the games we should win," Riewoldt said.