Owls focused on cup-tieContinuation in the Capital One Cup on Tuesday is the aim for Carlos Carvalhal as the Owls' head coach plots the route through to the third round.
A total of nine Championship clubs were knocked out of the competition by lower league opposition in the first round earlier this month.
The Owls’ opponents in the second round, Oxford United, caused perhaps the biggest upset of them all by defeating Brentford 4-0 at Griffin Park.
Carvalhal says the key is to stay alert and focused on the task in hand.
“There are always surprises in the cups but surprises happen when you are sleeping,” he said.
“If you are sleeping, the big surprises come. We must stay alert, with the full energy, and do our best.
“This will be the spirit for this game and all the games we have this season.
“We will play the players that fit into the strategy, the players who recover better than others, the players who can play 100%. We will play the best team for that moment that we believe can win this match.”
Wednesday made six changes for the Yorkshire derby with Leeds on Saturday and Carvalhal is likely to mix things up for the midweek clash as the fixtures come thick and fast on all fronts.
Carlos continued: “As you saw in the last match for example, Liam Palmer wasn’t in the squad against Reading, he was out of the 18 completely.
“He then played very, very well against Leeds from the start and this is very important because we are creating a good dynamic.
“We can only name 18 players on the matchday but of course we have more players in our squad so not all can be involved. But like I say, we will choose the players we think are best for us to win the match.
“We respect our opponent, it won’t be an easy match and we want to do our best to try to continue in this competition.”