Chelsea fear they will be unable to fly to Middlesbrough and back for their FA Cup quarter-final on Saturday, and instead will have to undertake a 10-hour, 536-mile round-trip from their Cobham training base in Surrey to the Riverside Stadium by coach.
The club is still reeling from the UK government's decision last Thursday to impose sanctions due to owner Roman Abramovich's close links with Russian president Vladimir Putin.
And those sanctions, including a £20,000 spend on travel costs for away matches, will hit the first team at the weekend.