Sinclair has been strongly linked with a move to Celtic with the Daily Record is reporting that the Hoops have already made five bids for him.
The 27-year-old yesterday further fuelled the rumours by removing all Villa-related information from his Twitter page.
However, Matteo is adamant that Sinclair won't be going anywhere. He said: "We're in a position where we don't have to sell any player.
"There has been rumours about many of our players on the market.
"There is some interest in our player (Sinclair).
"There might be some changes but at the moment we're not looking to sell."