Pique was rushed back from a knee injury to play against PSG in midweek and Koeman says that he is feeling fine.
"He is fine. We did well to let him play 60 to 65 minutes," he noted.
"He had no problems afterwards. He's had a rest and he's available [to face Cadiz]."
There was an incident that hit the headlines after the PSG result, as footage emerged of Pique and Antoine Griezmann arguing before a corner came into the box. The Barcelona boss doesn't mind it, though.
"During a match there is a lot of emotion," Koeman explained.
"It's good to have people who react and are not happy. You're not going to ask please... during the match there's no problem with these things happening, I like it... then you have to talk and get along... you have to try to do your best to win a match. I don't like them to be quiet."