Ronaldo's stellar 87th-minute free kick completed his hat-trick and won a point in the 3-3 thriller with Spain.
Jose Gimenez rescued Uruguay against Egypt with a towering header in the 89th minute of a 1-0 win.
Morocco's Aziz Bouhaddouz had the most dramatic late tally: a shocking own goal headed past his own goalkeeper five minutes into injury time to let Iran sneak by with a 1-0 victory.
All goals and highlights
Will there be more late goals? See all the match highlights and goals from the 2018 FIFA World Cup on FIFA.com!