Daniil Medvedev booked his place in the last four of the ATP Finals on Wednesday after beating Alexander Zverev 7-6 (9-7), 6-4, while Carlos Alcaraz cruised past troubled Andrey Rublev to get his campaign up and running.

World No. 3 Medvedev had to win in straight sets to claim a spot in the semifinals in Turin with a match to spare and he saw off big-hitting German Zverev in a stodgy Red Group encounter.

He faces Carlos Alcaraz, a 7-5, 6-2 winner earlier in the day, in his final match and has the world No. 2's last-four hopes in his hands.