The groups for the ATP finals are set and Roger Federer and Sascha Zverev have landed in the same group.
Roger will face Jack Sock in the opener and then Zverev and Cilic. On the other side, Nadal will face an in-form Dimitrov, Goffin, and Thiem.
Here the groups
GROUP Pete Sampras
Nadal
Dimitrov
Thiem
Goffin
GROUP Boris Becker
Federer
Zverev
Cilic
Sock
These are the first matches
Sunday
2:00 PM Federer-Sock
8:00 PM Zverev-Cilic
Monday
2:00 PM Thiem-Dimitrov
8:00 PM Nadal-Goffin