There was a little bit of pushing and shoving between respective outside halves Ronan O'Gara and Jaco van der Westhuyzen after the physical encounter and Gordon D'Arcy appeared not to shake hands with his opposite number De Wet Barry.
But O'Callaghan, who was leading the Lions for the first time on his second tour, claimed there were no lasting problems.
"It was a hugely physical game, but there was n ill-feeling. We are at a level where we can't sink to that," said O'Callaghan.
"Things go on in games, but you have to respect the other players. They came into our dressing room after the game and we swapped jerseys.
"We gave a few silly penalties away, but we stayed very composed when there was a lot going on off the ball. We rose above some of the stuff that was happening."
Leinster and Ireland centre D'Arcy, who was caught late by a thundering tackle from Frikkie Welsh in the opening exchanges, said he wasn't happy with some of the things that went on in the game.
"There was stuff going on that I wasn't happy with, but it was always gong to happen. I shook De Wet's hand at the end, but I didn't look him in the eye," said D'Arcy.
"There were a few late and high hits and stuff like that. They said they wanted to rough us up a bit before the Test, but I'm still walking so that's OK."
Guinness PRO12
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