winger Williams, 22, is Barça's top target and president Joan Laporta suggested his €58 million ($62.73 million) release clause is affordable, but a combination of reasons have complicated a potential transfer.

Sources insist paying the clause is not a problem, as Barça have the money available, but they are unable to guarantee Williams will be registered with LaLiga immediately.

They remain in excess of their LaLiga-imposed spending limit and until they bring in cash through transfers or new revenue streams, they are limited on what they can spend by the league.

The pressure being put on Williams, who excelled for as they won Euro 2024, to stay at Athletic -- where he plays alongside his brother, Iñaki -- for another season, coupled with interest from , are further motives that lead Barça to believe a deal won't be possible.

消息人士称支付尼科违约金对巴萨来说不是问题，但他们不能确保尼科会立刻注册在西甲联赛。

巴萨依然超过了西甲联赛实施的支出限制，直到巴萨通过转会收入或者新的收入流注入资金，他们就会受到联赛对他们支出的限制。

尼科被给予在毕尔巴鄂竞技再呆1年的压力以及PSG对球员的兴趣是导致巴萨相信转会不可能的进一步的动机。