Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Zimmermann has not featured since damaging his foot in a 2-0 defeat at West Ham on his top flight debut in August.
The central defender is targeting a return for the festive swing but was involved in the first part of City's training session at Colney under the watchful eye of Daniel Farke.
Teemu Pukki was also among those who took to the training pitches after his goalscoring exploits for Finland during a successful conclusion to Euro2020 qualifying.
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Kenny McLean sat out both of Scotland's qualifiers but did take part in training for his club.
Farke will provide a full fitness update on the likes of Zimmermann, Grant Hanley, Jamal Lewis and Josip Drmic when he holds his pre-match press call on Friday lunchtime ahead of the trip to Merseyside.
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
- View pictures from City's Thursday training session below
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
Daniel Farke was wrapped up well at Colney on Thursday Pictures: Brittany Woodman/Archant (Image: Archant)
NCFC Training 21st November 2019 Pictures: BRITTANY WOODMAN (Image: Archant)
NCFC Training 21st November 2019 Pictures: BRITTANY WOODMAN (Image: Archant)
NCFC Training 21st November 2019 Pictures: BRITTANY WOODMAN (Image: Archant)
NCFC Training 21st November 2019 Pictures: BRITTANY WOODMAN (Image: Archant)
NCFC Training 21st November 2019 Pictures: BRITTANY WOODMAN (Image: Archant)
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