This had absolutely nothing to do with their professional relationship.

What you've got to understand is that we have a professional relationship.

What's more, it can cause problems in social and professional relationships.

"Partner" may be used for a professional or business relationship.

While they did not dissolve the company, their professional relationship seemed to be over.

"I did not know she had a professional relationship in that case," he said.

A romantic and professional relationship between the two continued for several years after.

And if I'm his friend, you can't have a professional relationship with me?

Mother and daughter had an extremely close professional relationship as well.

"Isn't it true that you two have more than a professional relationship?"