This came after brilliant left-handed batsman Khawaja suffered a hamstring injury during his side's last match against Proteas at Old Trafford Cricket Ground, Manchester on Saturday.
Australia revealed on Sunday the injury is likely to preclude his involvement for the remainder of the tournament, while Stoinis' side complaint leaves him doubtful for Thursday's mouthwatering semi-final against England.
"It's such a pity for Khawaja, for someone who's been so integral to how we've been playing", Langer told Cricket Australia's website on Sunday.
"We've got nothing to lose, we've only got stuff to gain".
Four years of planning will be put on the line for England when they face holders Australia in a blockbuster Cricket World Cup semi-final at Edgbaston on Thursday.
But Langer said they would stick with picking a top four that could strike centuries and adapt that to facing England's bowling attack. ICC Shares Message For Fans Ahead of India vs New Zealand CWC 2019 Semi-Final Encounter on Reserve Day.
Officials investigating possible first fatality from Ridgecrest natural disaster
Teams have so far surveyed just 10% of the 1,200 facilities at Naval Air Weapons Station China Lake, spokeswoman Margo Allen said. The 56-year-old was last seen alive at a local gas station in Pahrump on July 3, the Nye County Sheriff's Office said.
Samsung Galaxy Note 10 official press renders are here
The familiar Galaxy Note design will be available in a new silver color option with a funky gradient effect and a blue S Pen. Do note that marketing images tend to show slightly more trimmed bezels compared to what you get with the actual product.
South Korean follows in father's footsteps and defects to the North
Because neither country signed a formal peace treaty at the end of it, the two countries are techically still at war. If confirmed, it would be an unusual case of a South Korean defecting to the impoverished, authoritarian North.
Luckily for Australia, both Wade and Marsh may be very useful additions to the team. However, coach Justin Langer said that not only the new players but all the "22 guys on the park" will be in pressure.
Matthew Wade from the Australia A squad will replace Khawaja in the squad.
Their meeting earlier in the tournament at Lord's saw Australia prevail but England have since rebounded by beating India and New Zealand and Finch knows his side must regroup quickly. He has done a couple of hammies before and it feels a bit similar to that.
Australia's 2015 World Cup-winning captain Michael Clarke reacted to the call-ups, saying: 'Great selection - Wade must play!
"If you go back 12 months ago there wasn't too much to be relaxed and chilled about in Australian cricket, was there?" It didn't just affect our cricket, it affected our country. "Whether it's Steve Smith batting at No. 3, whether it's Alex Carey coming up, we've got so many options - it's a very adaptable team", Langer said.
"They'll get Jason Roy back for the fixture, so we're going to have a few days now to discuss if we need to change anything but I think the way we played England last time was a great blueprint moving forward". We went through a major crisis in our cricket.