The Aussie ace said he rallied after that to take the tie-break 7-0 and tie the Davis Cup match against Ferrero at 2-all.
He is the sixth American and just the 13th player in the history of the ATP rankings to finish the year at the top.
Alexander Zverev is a potential superstar who bears comparison not only with his fellow German Boris Becker but also the great American singer Bob Dylan.
Agassi thrashed South Korean Lee Hyung-taik 6-1, 6-0, 6-0, while the Russian was beaten 6-0, 6-1 by Justine Henin-Hardenne of Belgium.
A dominant Delhi Dreams registered their second successive win in the Champions Tennis League (CTL), defeating a fighting Mumbai Tennis Masters 27-19 in a North Group match in New Delhi on Tuesday night.
List of French Open men's singles champions:
Chocolate majors, home and surface cleaning companies, beauty brands say that business has been brisk this festive season.
Briton Andy Murray will take over from Novak Djokovic as World No 1 when the rankings are updated on Monday after his Paris Masters semi-final opponent Milos Raonic withdrew with a leg injury on Saturday.
With the year sprinting to a close, we bring you, in pictures, some of the best action from the sports world.
List of US Open men's singles champions since the open era began in 1968:
News of all that's transpired on and off the football field
Mischa still finds time to tease 'Sascha', despite his little brother's rapid ascent up the tennis rankings.
The 2nd major of the year, the French Open will start on the weekend. With the clay-court grand slam starting on Sunday, here is the list of French Open champions over the years
A round-up of results from the Nations League matches played on Sunday
Sania, the country's finest woman doubles player, who began the year with the number one ranking, closed it at number 9.
Bill Clinton was the first husband to give a speech on behalf of his wife as the nominee of a major party.
The ambitious Champions Tennis League (CTL) suffered a major setback when World No.10 David Ferrer pulled out of the event on Monday, citing 'health issues'.
Sania Mirza recently added a mixed doubles gold from the Asian Games to her three Grand Slam titles in the same category, and is ranked world No. 7 in doubles. However, Indian tennis legend Vijay Amritraj says he would have loved to see her do well in singles and fulfil her true potential.
Looking at how the idea of gift giving and taking on Diwali has changed
What still motivates Leander Paes? How long does he intend continuing playing at the top level? Harish Kotian attempts to find out.