Wesley has come under fire for a slow start at Villa since he signed, with the Brazilian finding the net just twice in his first seven Premier League matches.
Even Smith admitted that Wesley wasn’t at his best during Villa’s last match, which finished 2-2 against Burnley.
But Smith thinks that Wesley has shown a real determined streak on the training field over the past few days.
"His performance against Burnley on Saturday wasn't great and he was the first to admit that to me when I went through his clips with him," Smith said.
"What I've seen in training from this week has been a reaction and he will go out there to try and prove people wrong. It's a tough job as a lone striker and he was up against two streetwise centre-backs.
"James Tarkowski I've had myself at Brentford and [Ben] Mee can both give centre forwards in this league a lot of problems.
"The fact they got the upper hand on him early in the game and he showed his frustrations a little bit, he'll learn from.
"He's a young striker, still only 22, but he'll get better and better.”
Villa have limited options up-front this season, so there is a weight of pressure on Wesley’s shoulders to start firing soon.
The claret and blues could turn to Keinan Davis or Jonathan Kodjia, but neither striker offers a guarantee of goals at Premier League level, and there are question marks over whether they are an upgrade on Wesley.
Smith now has a decision to make ahead of Villa’s next match, with the striking spot seemingly up for grabs.
Villa are in action tomorrow against Norwich City, in a game where they are under pressure to get some points on board.
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