Carlos Carvalhal is convinced his Owls side can “do better” despite their victory over Aston Villa.
Striker Fernando Forestieri’s well-taken late strike ensured Wednesday got off to a winning start at Hillsborough yesterday.
Carvalhal, who is still seeking to bring in defensive reinforcements, said: “I’m happy we won.
“If we hadn’t won against Villa, we would have been under a little pressure to try and win at Norwich.
“When you win the first game, you are under less pressure.
“It was important to win. It will give us confidence, of course, but we are taking it just one game at a time.
“We can do better. We are still trying to improve the team but we are in a very good way.”
Carvalhal paid tribute to Wednesday’s supporters, who were in fine voice throughout.
He said: “The fans were amazing.
“They supported our team and were crucial in us beating a tough opponent.
“Before the game I said we were ready for the competition. Compared to last season we were more compact and more aggressive.
“We moved the ball well and when we didn’t have the ball we had a good reaction.”
The only thing that took some of the gloss off the Villa scoreline was summer signing Steven Fletcher suffering a nasty head wound in the first half which required 10 stitches. The striker was forced off in the 26th minute following a collision with Tommy Elphick.
Carvalhal has confirmed Fletcher will play no part in their EFL Cup first round tie at Cambridge United tomorrow night.