PP help

[mattchewone]

Did some photos for a karate instructor a while ago and had some rather distracting backgrounds. I tried cloning out via some help on another thread but couldn't manage anything satisfactory. So I tried using topaz remask to remove the background and I came up with these.

What do you think? How can I make the black background look a little more realistic?

There off my phone so are low quality.

Thanks