Petrov scored against West Ham United in the Premier League last week and set up Carlos Tevez's goal but he was an unused substitute in City's 1-1 draw at Aston Villa on Monday.
"I wanted to save my energy to win some jitball matches during Bulgaria training sessions," Petrov said sarcastically to explain why he did not play against Villa.
"No, I didn't do it for him (Hughes). I did it for my wife because she forgot my number", Petrov told reporters on Wednesday at the Vasil Levski national stadium, hinting at his limited opportunities at City.
Petrov is preparing for the Balkan country's last two World Cup qualifiers against Cyprus and Georgia on October. 10 and 14.
"When they give me a chance I give my best," he added. "I think I've shown that I deserve a place in the starting line-up but it's up to him (Hughes).
"It's not a pleasant (situation). I'm a professional and I'm observing my obligations but it doesn't rest well with me."
