Lee Bullen says the Owls learned valuable lessons following the 2-2 draw with Espanyol at Hillsborough on Sunday.
An entertaining friendly encounter saw cracking goals at both ends, with each side probably deserving a share of the spoils.
Wednesday created most of the chances but the La Liga side struck two superb hits to secure a draw.
Bullen said: “It was a really enjoyable game and I think we’ve learned some lessons today.
“It’s not often you come up against a team from Europe playing in the top division so these are really valuable experiences.
“We dominated most of the game but credit to Espanyol because they’ve scored two fantastic goals.
“We know what these games are all about, we know why we are playing them and it all counts towards that first one of the season against Reading.”
With the Owls’ summer schedule now complete, Bullen insists the squad is in great shape, mentally and physically, ahead of Saturday’s Championship curtain raiser at the Madejski.
He added: “The players are doing really well on all fronts and they are ready to go at Reading on Saturday.
“If I am in charge on Saturday – and football can change very, very quickly – then it’s going to be a heck of a job picking the squad, never mind the team.
“There’s going to be some players who unfortunately we will have to leave at home and they will be entitled to be very disappointed.
“But that’s a reflection on how good the boys have been doing and how they are bursting to get this season started.”