The American goalkeeper looked to have lost his status as Tottenham's first choice to Hugo Lloris but could regain his place when the Blues visit White Hart Lane
The American saw his record run of 310 consecutive Premier League appearances ended as summer signing Hugo Lloris was chosen to start against Aston Villa earlier in October.
However, Villas-Boas suggested that the 41-year-old could be handed a return to action when the Blues visit White Hart Lane on Saturday.
He told ESPN: "They compete for a position. In the end, we have made Brad the No.1 for the beginning of the season and we still see Brad as No.1, a player who has been tremendous in goal for us. We respect that.
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"Certainly, Brad has been tremendous, we respect that. He is looking in form, as Hugo is. He has done brilliantly this week for France [in the 1-1 draw away to Spain]. So competition will continue between the two. The decision will be left before the game."
The Portuguese manager acknowledged that Friedel had been bitterly disappointed to see his eight-year run of games ended, adding: "We spoke about it before. In the end, it was difficult for him, not because of the consecutive run - he was looking good. It was not on performance that we made the switch, that's for sure.
"We had the opportunity to give Hugo a consecutive run of four games - including the two national-team games like it happened.
"We are extremely happy about the fact we did. It gave him the first impact of Premier League football. But, as a great professional, he has to move on from that."