The 24-year-old winger scored his first Champions League goal and the only goal of the game in Moscow last night.
Fergie is happy with the way his £17million signing from Wigan is adjusting to life as a United player.
He said: “Valencia has been a plus point for the last few weeks. He is emerging very well, settling into the club, and his confidence is getting stronger.
“He has tremendous assets for a wide player, but the assets he didn’t show at Wigan were his goals, where he would maybe only get three or four a season.
“This was his challenge when he signed for us. Two in two games will help him.”
