British authorities have yet to renew a visa for Roman Abramovich, Chelsea's billionaire Russian owner, after it expired last month, according to reports.
London-based Abramovich, who bought Chelsea in June 2003, is currently without a visa for the UK, according to the Financial Times.
He was not seen at Saturday's FA Cup final at Wembley, which saw a 1-0 win for Chelsea over Manchester United.
John Mann, the 51-year-old Abramovich's Moscow-based spokesman, told Press Association Sport it was a private matter and there would be no comment.
The hold up was first reported by Russian news agency the Bell, which claimed that the club owner's visa expired several weeks ago.
The report cited three people who know Abramovich, listed by the Sunday Times as Britain's 13th richest man, with a net worth of £9.3billion.
The Financial Times pointed to the increased geopolitical tensions between the Kremlin and the west.
But there is nothing to say the Abramovich visa situation, where his renewal application is taking longer than usual, is linked.