According to an AFP correspondent, Harinordoquy's father came down from the stands in the sixth minute of the Biarritz clash and faced up to Bayonne flanker Jean-Jo Marmouyet after his son got involved in a punch-up far from the action.
Harinordoquy senior's sense of family loyalty was brought to an abrupt halt by Bayonne fly-half Benjamin Boyet, who tackled him to the ground before Biarritz hooker Benoit August stepped in to restore order.