The German will head into Friday at the top of the table.

World No. 3 Carlos Alcaraz denied two set points in the tiebreaker fending off Andrey Rublev 6-3, 7-6(8) at the ATP Finals.

The Italian isn't qualified for the semifinals yet, but he's on the cusp.

Daniil Medvedev swept Alex de Minaur 6-2, 6-4 in Turin today, scoring his first Top 10 hard-court win since Indian Wells last March.

World No. 2 Alexander Zverev did not face a break point sweeping Andrey Rublev 6-4, 6-4 in his ATP Finals opener today.

The Norwegian won for the first time in five tries against Alcaraz .