Spurs were thought to be close to signing Manchester City forward Emmanuel Adebayor on a permanent deal following his successful loan spell at White Hart Lane last season, but a move is yet to materialise.
Louis Saha’s release has left 29-year-old Jermain Defoe as Spurs’ only senior striker ahead of the new season.
And Villas-Boas is hoping to bolster his attacking line-up in the next few weeks before Spurs’ trip to St James’ Park on 18 August.
“In this market it’s important to make good, sound bids, not just to do anything for the sake of it,” Villas-Boas said.
“We are hopefully moving in the market in the next couple of days or weeks.
“We are trying to deal with the market. Lots of teams are having difficulty, there’s not a lot of money around and teams try to hold onto their assets as best they can.
“We’re just trying to make the best decisions possible before the start of the league – hopefully trying to solve the issue with one more striker before the Newcastle game.
“It’s funny because last January everybody was expecting one big move to trigger all of the others and it didn’t happen, so I think it’s just a sign of the difficult financial situation in all of Europe. It spreads out into football.
“The Premier League is obviously the richest league in the world and clubs are trying to be able to move the market. Some can and others are trying to trigger that move, but that doesn’t mean it will happen.”
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