Ronaldo's injury, coupled with Barcelona avoiding defeat despite playing half the contest with 10 men, meant it was the Catalans who left the more satisfied.
Manager Zinedine Zidane said the injury was "a small thing" and Ronaldo will be fit for the Champions League final against Liverpool on May 26.
Meanwhile, Iniesta's teammates and the fans at Camp Nou paid their tribute to the veteran post match.
The club did say, however, that Dani Carvajal - recovering after injuring a hamstring in the first leg of the Champions League semifinal at Bayern Munich on April 25 - "worked alone out on the pitch both with and without the ball".
Both sides pushed for a victor and Real could have had a penalty when Jordi Alba caught Marcelo but Barca clung on to remain unbeaten in the league with three games to go.
Gareth Bale ensured the points were shared with a late equaliser, having trailed to goals from Luis Suarez and Lionel Messi.
The tone for another bad-tempered game between these two giants was set when Real refused to give Barca a guard of honour after Ernesto Valverde's side secured a 25th La Liga title last weekend.
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.
"How long he will need I can not tell you but for him, it is a small problem", Zidane said afterwards. Atletico Madrid are second on 75 but have played one game more.
And the bad blood did not stop there in a match in which the referee Alejandro Hernandez Hernandez dished out one red card to Sergi Roberto, eight yellow cards, including bookings for Ramos and Suarez.
"I do not know if in the second half he would have done it in other ways". Suarez appeared to foul Raphael Varane on the play, but was not whistled for an infraction.
The pair have been long-time rivals, and while Ronaldo wins the battle in terms of goals, Messi trumps the real Madrid star in terms of club trophies won, as well as possessing a better goals-per-game ratio.