The winger, signed from Swansea last week in a deal reportedly worth up to ?8million, hit a first-half spot-kick against the post against Liverpool at Kirkby before being taken off after the break.
England midfielder Gareth Barry also played most of the 2-2 draw as he continued his recovery from the abdominal injury which ruled him out of Euro 2012.
Sinclair otherwise had a promising game and his penalty blushes were spared when Jordi Hiwula struck from the rebound before Denis Suarez added a second from the spot.
The City goals came either side of Marc Pelosi efforts for the Reds
Source: team talk
Source: team talk