This could easily happen.
Going into the WTF Murray leads the race by 405 points.
If Murray wins all round robin matches and gets through to the final but loses to Djokovic - he gains 1000 points
If Djokovic wins 2 round robin matches and get through to the final against Murray and wins - he gains 1300 points.
Murray 405 + 1000 = 1405
Djokovic 1300
Murray ahead by 105 points - hence, he is still number 1 after the WTF.
However, on November the 28th his 275 points from last years Davis Cup falls off, hence
Murray 1405-275 = 1130
Djokovic 1300
Hence, Djokovic is year end number 1
Has there ever been a time where someone was number 1 AFTER the WTF but still lost the Year end number 1? The other unprecedented occurrence is someone wining the YE number by a mere 170 points (less than 1 round robin match at the WTF).
Going into the WTF Murray leads the race by 405 points.
If Murray wins all round robin matches and gets through to the final but loses to Djokovic - he gains 1000 points
If Djokovic wins 2 round robin matches and get through to the final against Murray and wins - he gains 1300 points.
Murray 405 + 1000 = 1405
Djokovic 1300
Murray ahead by 105 points - hence, he is still number 1 after the WTF.
However, on November the 28th his 275 points from last years Davis Cup falls off, hence
Murray 1405-275 = 1130
Djokovic 1300
Hence, Djokovic is year end number 1
Has there ever been a time where someone was number 1 AFTER the WTF but still lost the Year end number 1? The other unprecedented occurrence is someone wining the YE number by a mere 170 points (less than 1 round robin match at the WTF).