The Spanish champions have been slapped with a two-window suspension for breaching FIFA rules in regard to signing U-18 players.
The punishment as it stands will see the club unable to buy or sell for the coming year, which had looked likely to scupper their long-running plans to snap up Luiz.
But members of Barca’s hierarchy are confident that an appeal will buy them enough time to conduct some business this summer.
Vice President Manel Arroyo is said to be working on the case, which has prompted them to step up their pursuit of the Chelsea defender.
An offer of £25m is expected, which may be enough to convince Jose Mourinho to sell the Brazilian amid talk that he is unconvinced by his unorthodox playing style.
Luiz is seen as an ideal replacement for veteran club legend Carles Puyol, and a key part of Barca’s plans to reinstate themselves as a domestic and European force after a difficult campaign.
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