It was during Barcelona's away match against Valencia this weekend, a 5-0 victory, that television cameras captured Rodri's words to a teammate after he was substituted.
There he called Valencia "weak and terribly bad".
The former Manchester City captain, who moved to Barcelona in the summer, spoke to journalists after Barcelona's 5-1 thrashing of Feyenoord in the Champions League on Wednesday evening.
When you make mistakes, you have to apologise. I want to apologise to everyone who may have felt offended - players, fans. I have already had a conversation with my friend José Gayà (Valencia left-back).
Rodri was the captain of Spain's World Cup-winning team in North America this summer and was named the tournament's best player.
