Wednesday have been rocked by the news that captain Glenn Loovens will miss the start of the new Championship season.
The Star understands Loovens went under the knife in London yesterday for a long-standing ankle injury.
Now the Dutch defender is expected to be out of action for six to eight weeks, according to boss Carlos Carvalhal.
Speaking after Wednesday drew 1-1 at Alfreton Town in their opening pre-season friendly last night, Carvalhal told The Star: “It is, of course, not good news for us because Glenn is the captain of the team and an important player.
“It is a small problem that he felt last season.
“It is a surgery so he will be out a minimum of six to eight weeks.”
“It is not the end of the world because he will be back with us soon. He has a very good personality and is a fighter.”
Strengthening their defence is at the top of Carvalhal’s priority list.
“We don’t have many centre-backs or left-backs,” said the Portuguese chief, who has confirmed he has received no offers for their top stars this summer. “We have holes in those positions.”
Striker Fernando Forestieri was a notable absentee from their draw at Alfreton where Barry Bannan opened the scoring.
“Fernando had a small pain and we didn’t take any risks,” said Carvalhal. “If he had played, maybe he stay one or two weeks out.”
Keiren Westwood will resume first-team training today but is unlikely to be involved in Saturday’s friendly at Chesterfield.
Meanwhile, winger Ross Wallace has penned a contract extension, tying him to the Hillsborough outfit until 2018. The winger racked up 49 appearances for the Owls last season, hitting six goals in their march to the play-off final.