Andy Murry will be officially confirmed as world No 1 when the revised rankings are released on Monday.
British Andy Murray won three Grand Slam titles, two Olympic gold in 2016 and helped Britain win the Davis Cup in 2015. He reached 11 finals in 12 events and won a personal record 73 matches.
“I never thought I’d be number one in the world, ” he told BBC Sport. “It’s been many years of work to get here. It’s been such a difficult thing to do because of how good the guys around me have been.”