The Bulgaria international has suffered from a lack of football so far this season, playing just 23 minutes.
The 30-year-old joined City from Atletico Madrid in the summer of 2007.
“Martin is a big part of what we are trying to do,” Hughes said.
“He has not been a negative influence in any way and I know if I pick him from the start he will make a positive contribution.
“Martin is not starting games because I am playing a different formation that lends itself to Craig Bellamy playing on the left and he has been absolutely outstanding.
“That has made it difficult for Martin to get back into the team.
“He understands that. But he also knows I will use different personnel against certain opposition and he can make an impact.”
