Aljaz Bedene's latest attempt to overturn his ban from representing Great Britain in the Davis Cup has been rejected.
An arbitration hearing in London upheld the International Tennis Federation's principle players should no longer be able to play for more than one country.
Bedene became a British citizen in March 2015, but represented Slovenia in three Davis Cup ties before the switch.
The ITF rule was introduced with barely three months' notice on 1 January 2015.
That was after Bedene had lodged his passport application.
Charles Hollander QC concluded the ITF were not obliged to grant Bedene an exemption, but expressed the "greatest sympathy" for his predicament.