​Porto's elimination from qualifying for the ​UEFA Champions League this season at the hands of Krasnodar may have brought an end to one of the most illustrious careers of all time in the form of Spanish goalkeeper Iker Casillas.

For the first time in 20 years, ​Casillas won't be featuring in Europe's premier competition in the upcoming season. The World Cup winner, who is currently out of action as he still recovers his full fitness from the heart-attack he suffered at the beginning of May 2019.

With such a gap, ​Juventus hitman ​Cristiano Ronaldo is now nearing Casillas' 177 appearances in the Champions League, not including qualifiers and is set to become the player with the most appearances in the tournament's illustrious history, both in its current format and its predecessor the European Cup.

​AS report that the former ​Real Madrid goalkeeper has featured in every season of the competition for the past 20 years after making his debut in 1999-00, winning the tournament three times with Los Blancos and reaching the knock-out stages on a record 19 occasions.

Ronaldo has made 162 Champions League appearances and along with Leo Messi (135), who are the only players in the top 10 that are still active in European football along with Casillas.

In case Juventus win the tournament this season and Ronaldo feature in every game, the Portuguese legend will move to 175 Champions League appearances with one year remaining on his current contract with the Serie A champions and then he will certainly overtake Casillas to once again paint his name in gold in European football.