The actress had previously opened up about her love for boxing. Azubuike co-owns the boxing studio and athletic performance facility Gloveworx here.
Azubuike said working with Aniston has been a "great experience" reports people.com.
"She s very diligent. She is ready to work out hard every single time she hits the gym " Azubuike said.
"Whether it be a 45-minute session whether it be a 2-hour session she is always ready to go. Incredibly consistent and hardworking and that makes my job a little bit easier. She s a very good natural athlete " he added.
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