Australian opener Marcus Harris said he didn't feel out of depth during his debut Test at Adelaide even though there was hardly any margin of error against a quality side like India in the opening match.

"You always doubt yourself as a person, you're not sure if you're going to fit in Test cricket. So, it was good to spend time in the middle in both innings. I didn't feel out of my depth at all," said Harris, who scored a matching 26 in both the innings on debut at Adelaide Oval.