Jamarca Sanford got some reps with the first-team defense at free safety this week, but Vikings coach Brad Childress said there will be no starter changes in the secondary for Sunday's game against Arizona.

"There are not a lot of changes that are available back there," he said. "We're just trying to get a bunch of guys to get to the dance on Sunday. But no, not considering. Those guys will still mix and match back there and the guys that practice good are the guys that are going to be out there on Sunday." Safety Madieu Williams missed a sure interception last week when the ball somehow went through his arms and into the hands of Patriots receiver Brandon Tate for a big gain that set up their first touchdown. Williams also reacted slowly when Tate cut back to the middle of the field on his 65-yard touchdown catch.

"[The missed interception] was a tough one," defensive coordinator Leslie Frazier said. "He'll have some other opportunities and you have to make those plays. Sometimes one or two plays can turn momentum in a ball game in the National Football League so you have to understand that and when you have those chances to make those plays, you have to make those plays. Nobody feels worse about not coming up with that catch than Madieu. He'll have other opportunities and I'm sure he'll make the play." Sanford said he took some turns with the starters in practice this week but Williams is expected to start. "I think it was more just keeping me up to speed," Sanford said. "Making sure if something goes wrong that I'll be ready." As we've mentioned several times this week, the Vikings are banged up at cornerback. Four corners were on the final injury report, but only Frank Walker (hamstring) is questionable. Allen (back), Chris Cook (quadricep) and Lito Sheppard (hand) are probable. Allen is expected to start at right corner with Cook entering in nickel situations.