Ivanovic spent much of last season at centre-back, but is considered a right-back by Jose Mourinho and has featured on the flank in all but one of Chelsea's games this season, missing the Capital One Cup win at Swindon.
The 29-year-old is comfortable in either position.
"All my career I've moved inside and outside," he said.
"I'm really happy because it's good for me that I can play both positions. I always try to do my best wherever I play.
"In the end I'm happy because I like to defend, and I'm really enjoying defending in this team."
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