The 23-year old has become a key contributor in Paul Lambert's line-up this season and although his performances may largely go unnoticed by fans, Petrov insists the former Crewe Alexandra man does so much positive work for the side.
"Westy has been great," the Bulgarian told the club's official website.
"Some people watching him in his position don't see what he's doing. He gives the security to the team. He does the hard work. He does the dirty work. He is there for the team.
"Sometimes fans don't see that. But, I tell you what, your mates appreciate it. They know what you have done.
"Some supporters look to who crosses it, who scores, who saves a goal. People can forget about his role.
"He is always there. When the other team breaks, he is there. He makes sure the defence is protected. He works his socks off to help his mates."
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