Portuguese coach Jose Mourinho has predicted that ​Cristiano Ronaldo will still be scoring goals at 50 after his latest record-breaking exploits.

Ronaldo scored four goals in Portugal's 5-1 win over Lithuania on Tuesday night to break Robbie Keane's record for scoring the most goals in European Championship qualifiers.

The ​Juventus hitman, who played for Mourinho at ​Real Madrid has now gone on and scored 94 goals for his country Portugal and is showing absolutely no signs of slowing down anytime soon.

And Mourinho has hailed the five-time Balon d'Or winner as a "phenomenon" - and predicted he will never stop scoring goals even after retirement.

"What Cristiano does does not surprise me," Mourinho told Portuguese TV channel 11, as reported by the ​Mirror. "At 34, he is a top player, who plays in a top team and has top ambitions. It does not surprise me because he is a case study in genetic terms, and mentality as well."

The Portuguese coach continued, "He is a phenomenon, someone who only thinks about winning and doing it more and more and better. That is why I am not surprised at all what he does."

Revealing what Ronaldo will be like when he turns old, Mourinho said as he concluded, "When he is 50 years old he will be at home and FIFA will invite him to a game of legends. He will play the game and score a goal. I am sure it will be like that."

Meanwhile, Ronaldo has revealed multiple times of the good relation he shared with Mourinho and ​even suggested Juventus to hire the former Manchester United coach in order to replace Max Allegri, before the club eventually hired Maurizio Sarri.