Last updated Wednesday February 8 at 10:08 BST
The British number one says he can lift a major title.
Impressive singles wins on Saturday for Anne Keothavong and Elena Baltacha swept Britain to victory.
The Scot is set to miss the Europe/Africa Group I Zone match in Glasgow.
The British number one loses to Novak Djokovic 6-3 3-6 6-7 6-1 7-5.
Novak Djokovic has pulled the match back to two sets apiece to set up a final set showdown.
Japanese opponent Kei Nishikori was no match for the Scot, who triumphed 6-3 6-3 6-1 in their last eight tie.
The Scot will face Kei Nishikori in the quarter-finals after his fourth round opponent Mikhail Kukushkin was forced to retire with injury.
The Dunblane ace will face the Kazakhstan player for a place in the quarter-finals of the Australian Open.
The Scot moved into the fourth round of the competition with an entertaining straight sets win over the Frenchman.
The Scot saw off French opponent Edouard Roger-Vasselin in straight sets 6-1 6-4 6-4.
The Scottish player was emotional after falling to defeat at the first hurdle against world number 107 Stephanie Foretz Gacon.
The Dunblane ace hopes the appointment will ease the criticism of his coaching team.
The Scot lost 6-2 6-4 to France's Stephanie Feretz Gacon in the first round of the competition.
The Scot defeated Alexandr Dolgopolov 6-1 6-3 to win his first title of the year.
The Scot will take on Alexandr Dolgopolov as he claims to win his first title under new coach Ivan Lendl.
The British number one saw off Marco Baghdatis to reach the semi-finals of the ATP Brisbane International.
The British number one will now turn his attentions to regaining fitness for January's Australian Open.
The British number one has pulled out as a result of a groin injury.
The world number three struggled with a groin injury as he lost his opening match in straight sets.
The British number one has been drawn with Novak Djokovic, David Ferrer and Thomas Berdych in Group A.