Novak Djokovic and Serena Williams have been named as the International Tennis Federation's world champions for 2012.
Serbian Djokovic pipped Andy Murray to the men's award after finishing on top of the rankings for the second successive year, as well as defending his Australian Open crown.
He also reached the finals at the French Open and the US Open, where he was beaten by Murray, and triumphed in the season-ending ATP World Tour Finals in London.
"I am proud to have been named ITF World Champion for the second successive year," Djokovic said in a statement.
"It was very difficult to follow up such a successful season in 2011, but it was extremely satisfying to win another grand slam title, reach two other major finals and finish the year at number one."
Williams, meanwhile, scooped the ITF honour for the third time in her career.
The American proved unstoppable in the season half of the season, winning both Wimbledon and the US Open.
The 31-year-old also took home two golds from the London Olympics in the summer, teaming up with her sister Venus to add the women's doubles to her singles title.
"It means a lot to be named ITF World Champion for the third time," Williams said.
"It has been such an amazing experience this year to win the Olympics and two Grand Slam tournaments, and I look forward to having an awesome 2013," said the 15-times major winner."
Americans Bob and Mike Bryan were named men's doubles world champions for the ninth time in 10 years, while Sara Errani and Roberta Vinci of Italy, winners of the French Open and US Open, scooped the best women's pairing.