Barcelona still need at least €100 million ($102 million) to be able to register new additions and comply with the requirements of the Spanish league, newspaper Sport said on Saturday, citing club sources. Barca had previously admitted to having serious financial problems and yet have splashed the cash this pre-season, with Poland’s Robert Lewandowski from Bayern Munich the most eye-catching purchase for a fee of around €50 million. Even Bayern coach Julian Nagelsmann has openly wondered how the maths work given their debts are a reported €1.35 billion. Barcelona sold a further 15% of TV right…