Bernard Tomic has all but closed the door on helping Australia reach their first Davis Cup final in more than a decade as he focuses solely on arresting his dramatic rankings slide.

Even after suffering his fifth successive first-round exit, a defiant Tomic maintains he can push for a place in the world's top 10 - and that means there's no room in his schedule for Davis Cup.

Going through a poor patch of form: Bernard Tomic. Credit:Getty Images

The 24-year-old boycotted Australia's first-round win over the Czech Republic due to a family funding feud with Tennis Australia before also missing this month's quarter-final triumph over the USA.

Breaking his months-long silence on the issue, Tomic said he was "not really" interested in making himself available for Australia's semi-final against Belgium in September.