The referee made some poor decisions on the pitch that saw both clubs feel disheartened in an enthralling El Classico.
"He's not great right now but I think it's going to be a small thing, it was only a bad movement", Sky Sports quote the Frenchman as saying.
"We wanted to win it, Sergi's sending off damaged us, especially against a team like Real Madrid".
Barcelona players celebrate with fans after the match.
After several feisty challenges in the last minutes of the first half, the hosts were reduced to 10 men as Sergi Roberto was shown a straight red card following an incident with Madrid left back Marcelo.
"We watched an incredible game of football and I can't say if the draw is fair or not", said Real coach Zinedine Zidane, who would not be drawn on the referee's performance.
But regardless of his ability, there is little a player can do to stave off the physical effects of time, and fearing the potential onslaught that was likely to come Barca's way, Valverde felt Iniesta's talents were to become a luxury.
Ernesto Valverde and Zindine Zidane
Ronaldo paid a price for the goal with Gerard Pique stepping on his ankle as he unsuccessfully tried to stop the Madrid forward from scoring.
"They played well and so did we.We had a good opportunity to win today, clearly, we had a lot of chances to score, especially in the first half, in the end it was a draw and that's that, there are two games left and, in the end, Barcelona will finish the season unbeaten", Zidane said.
Ronaldo appeared to shake off the injury.
Suarez and Bale otherwise had few openings in front of goal, while Messi and Ronaldo were thwarted by saves from Keylor Navas and Marc-Andre ter Stegen.
Messi earned himself a yellow for a hard tackle on Ramos before Roberto responded to Marcelo's bump from behind by slapping at his face. Aided by an official who completely lost the plot, the match got out of control at the end of the first half.
"As we are a family, and they didn't want to give us a guard of honour, I've asked our staff to make one", he explained to the crowd.
Ronaldo stayed on the bench and, without its star, Madrid couldn't impose its numerical advantage. The southern Spain side have already clinched the title, and look set to match Arsenal's seemingly impossible task of not losing through an entire league season.
Alaves routed Malaga 3-0, and Getafe beat Las Palmas 1-0.
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