Blackburn issued a statement on Wednesday that it had agreed to a deal for Friedel and it was only conditional on its finding a replacement for him.
That replacement should be Paul Robinson, the England goalkeeper who lost his starting job at Tottenham to Brazilian Heurelho Gomes.
Blackburn's need to cut a deal with Tottenham could spur it into completing a deal -- estimated to exceed $30 million to send young England winger David Bentley from Rovers to Spurs.
According to the Daily Mail, Villa has offered Friedel a three-year deal at double his current salary: $100,000 a week.
Friedel could be in action as soon as Saturday when Blackburn hosts Danish club Odense in the Intertoto Cup.