Cardiff City duo Lee Tomlin and Gary Madine will miss out on the club's tour of America after being denied visas to enter the country.
The pair would have been keen to impress on the Bluebirds' visit to the US - with both looking to change their fortunes after so far struggling in south Wales.
However, neither will get the opportunity, with America's strict policy on visa applications putting a block on their plans.
It's understood Tomlin and Madine have been denied visas to enter the US due to their criminal records.
In November 2017, Tomlin pleaded guilty to affray and was ordered to perform 80 hours of community service after an early-hours brawl in Leicester.
While Madine was sentenced to 18 months in jail in 2013 after being found guilty of assault - being released after four-and-a-half months.
As such, they will be unable to join their team-mates in flying out on Thursday.
Instead, they could potentially join first-team coach Ronnie Jepson with the under-23 team for fixtures in Devon and Cornwall. Whether they head to the West Country will depend on their individual programmes.
But not being able to play under Warnock in America will come as a blow to both players, with Tomlin in particular having been on the comeback trail this summer after returning to the club in good shape and keen to break into the Yorkshireman's plans.
It is understood however that Warnock is keen on giving Tomlin a chance this summer to prove himself.
The playmaker recently spoke movingly about his mental health struggles, admitting he contemplated taking his own life.
Madine too will be keen to resolve his future - whether that is with the Bluebirds or elsewhere - and missing a high-profile tour will do little to help him either cement his place in Warnock's thinking or put himself in the shop window.
The Bluebirds will also be without Sol Bamba and Callum Paterson for the trip stateside, with the duo continuing their rehab after serious injuries.
