Raiders coach Norv Turner said that Porter, who had career-highs of 64 catches, 998 yards and nine touchdowns last year, is still rehabilitating his hamstring injury and the team won't know whether he'll be able to play until early next week.
''He did his rehab (Friday) and he ran some routes during our individual period,'' Turner said. ''He moved around pretty good. I'll be anxious to see how he feels tomorrow, and then hopefully he can do more on Sunday.''
Porter was injured on Aug. 1 when he suffered a slight tear in the hamstring of his right leg. Turner originally estimated Porter would be sidelined two weeks, but the sixth-year veteran did not play in any of the team's four preseason games.
Porter returned to practice during the last two days of training camp and had hoped to play in Thursday's game against the Saints before telling team trainers his leg was still bothering him.
On Tuesday, Turner said he considered the situation a setback for Porter and admitted he was concerned. Three days later, the Raiders coach sounded more optimistic but was still taking a cautious approach, saying Porter still hadn't been able to run routes in practice.
''He did it early (in the rehab) and then wasn't able to handle it early last week,'' Turner said. ''So this was a step up.''
Turner also said the Raiders remain undecided about who their starting right guard against the Patriots will be. Veteran Brad Badger had the inside track on the job when training camp began but eventually began splitting time in practice with three-time Pro Bowl guard Ron Stone.
Stone was a huge disappointment during his first season in Oakland last year and was eventually cut in the offseason before re-signing with the Raiders. Since then, Stone has impressed the coaching staff enough that they are mulling putting him ahead of Badger on the depth chart.
''I think the way we've practice those guys, we've gotten them both ready,'' Turner said. ''They are both veteran guys that realistically we know we are going to need them both. The way we've prepared them has been good. Both can swing and play other positions, also.''
The Raiders won't practice on Saturday but the coaching staff will be busy trimming the roster. Teams must be down to the 53-player limit by 1 p.m. PDT.