The striker played in a behind-closed-doors friendly at the club's training ground last week and Villas-Boas liked what he saw from the former Arsenal man.
"Our likely approach is to go with one up front (at City)," Villas-Boas said.
"They (Soldado, Adebayor and Jermain Defoe) are very near each other at the moment and it could be a possibility that even Ade could play that game.
"These are all decisions that we have to take. We don't have enough reasons at the moment not to trust Soldado and Defoe because they've been excellent.
"Hopefully it's a decision that's best for the team and best for the strategy."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball