Matteo Berrettini claimed a consolation victory at the ATP Finals as he beat the in-form Dominic Thiem in his final group match in London.
The Italian could not qualify for the semi-finals but beat a subdued Thiem 7-6 (7-3) 6-3.
Eighth-ranked Berrettini, who began the year outside the top 50, is the first Italian to win an ATP Finals match.
Austria's Thiem had already qualified for the last four by beating Roger Federer and Novak Djokovic.
Federer and Djokovic will compete for a semi-final place later on Thursday.
The top two players in each group after the round-robin stage progress to Saturday's semi-finals.