LONDON — Novak Djokovic ensured the world’s top four players reached the semifinals of the ATP Finals for the first time since 2004 by eliminating Alexander Zverev 6-3, 7-6 (4) on Friday.
The top-ranked Djokovic lined up Dominic Thiem on Saturday as he goes for a record-tying sixth title at the season-ending tournament, and a first since 2015.
No. 2-ranked Rafael Nadal will take on No. 4 Daniil Medvedev in the second semifinal. Nadal is trying for the 10th time to win his first ATP Finals crown.
Medvedev warmed up by blowing away Diego Schwartzman 6-3, 6-3 late Friday in