Chelsea manager Thomas Tuchel (AFP)
The Premier League club are operating under a special licence after the British government last week froze the assets of Abramovich as part of a set of punitive measures following Russia's invasion of Ukraine.
The licence is designed to prevent Chelsea and by extension billionaire Abramovich -- described by the government as part of Russian President Vladimir Putin's inner circle -- from generating new revenue.
Chelsea are banned from selling tickets and cannot spend more than £20,000 ($26,000) per match on travel costs, though the Blues are urgently lobbying ministers for a much-needed hike.
The European champions travel to face French side Lille in the last 16 of the Champions League on Wednesday, well placed to reach the quarter-finals after a 2-0 win in the first leg.
German boss Tuchel admitted Chelsea had been forced to make adjustments.
"There are restrictions and we have to deal with it," he said at his pre-match press conference on Tuesday. "There are adjustments in our amount of staff who are travelling, how many rooms we have in hotels, how we arrive at matches.
"To my understanding everything is in place now. We can arrive on a professional level because this is not about luxury, this is not about bling-bling."
He added: "We have a framework to go to Lille and play the game in Lille where there will absolutely be no excuses regarding this kind of organisation.
"It is already a bit more difficult to arrange things in a professional way, in the best way possible for the FA Cup (on Saturday) but we will deal with it.
"As long as we have shirts, as long as we are 'alive', as long as we are a team and we arrive with our players we will be competitive and we will fight hard for our success because we owe it to the people who support us."
Chelsea have asked for their FA Cup quarter-final at Middlesbrough to be played behind closed doors in the interests of fairness after they were blocked from selling tickets for the match at the Riverside Stadium.
"It is important for the competition that the match against Middlesbrough goes ahead," the club said in a statement.
"However, it is with extreme reluctance that we are asking the FA (Football Association) board to direct that the game be played behind closed doors for matters of sporting integrity.
"Chelsea FC recognises that such an outcome would have a huge impact on Middlesbrough and its supporters, as well as our own fans who have already bought the limited number of tickets that were sold before the licence was imposed, but we believe this is the fairest way of proceeding in the current circumstances."
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