Novak Djokovic was left to rue a "bitter" end to another record-breaking season after losing twice to Jannik Sinner as Italy defeated Serbia to reach the Davis Cup final.
The world number one suffered an unwanted career first when he failed to convert three consecutive match points in a pulsating 6-2 2-6 7-5 singles loss - his first in the competition in 22 matches and 12 years.
