Click through the gallery to see the top goalscorers in UEFA Champions League history.
The penalty was Ronaldo's 100th goal for Real Madrid in the Champions League.
Kroos is a first-choice player. How did Real Madrid beat one of the hottest sides in Europe?
But not BT Sport pundit Ferdinand, who claimed he saw the Portuguese do it all the time during training when the pair were at Manchester United.
Unai Emery's men have blown away all before them domestically this term, but with world-record signing Neymar failing to fire and captain Thiago Silva left to sulk on the Santiago Bernabeu bench, Cristiano Ronaldo led struggling Real to a 3-1, first-leg win.
Slow-motion replays showed that, rather than touching it with his standing foot, Ronaldo had disturbed the turf under the ball, making it move and effectively volleying it at Areola.
17 killed in mass shooting at Florida high school
He ventured back to his former high school, Marjory Stoneman Douglas, in Parkland, Florida, and shot and killed 17 people . He did promise to tackle school safety and "the hard issue of mental health". "No guns under 21", read one sign.
Mikaela Shiffrin turns in steady 1st slalom run
Hansdotter took advantage, putting together two legs with a combined time of 1 minute, 38.63 seconds for her first Olympic medal. When asked what she would do to adjust in her second run, Shiffrin replied: "Same thing as yesterday, no holding back".
Mane ´never doubted´ he would get back to best
Liverpool don't need to beat Swansea or West Brom to win the Champions League , and they don't need to be the best team in Europe either.
He told BT Sport, "He used to do that in training, you know".
"I swear to you, insane but he used to do it".
Madrid's match at Real Betis on Sunday is the first of three Spanish league games in a span of seven days.
However, former referee Graham Poll has revealed that it should not have stood as the ball is not allowed to be in motion when a penalty is struck.
The Portugal global plants his left foot as close to the ball as possible making it lift off the ground slightly before striking the ball sweetly with his right foot.