Boris Becker doesn't believe Serena Williams is the greatest tennis player ever.
He named Steffi Graf as the greatest female player of all time in a recent interview.
What happened?
Boris Becker was asked about his tennis picks during a quickfire round of questions with Eurosport Germany.
He also named Novak Djokovic as the best male player.
Why it matters for Boris Becker
Becker's opinion on the women's tennis GOAT sparked debate among fans.
Graf's record includes 22 Grand Slam singles titles, just one fewer than Williams.
What comes next?
Becker also built his ultimate ATP player in a separate video for Eurosport Germany.
He picked Rafael Nadal for the forehand and Roger Federer for the best one-handed backhand.
Boris Becker selected himself as the player with the greatest mentality.
He chose Andre Agassi for return of serve and Federer again as the top serve-and-volleyer.
Becker couldn't choose between Ivo Karlovic and John Isner for the best serve.
He went with Djokovic for the two-handed backhand.
Serena Williams holds more major singles titles than any other woman in the Open Era.
Many consider her the greatest WTA player ever.
Steffi Graf spent more weeks ranked number one and had a longer spell at the top of women's tennis overall.
Her record makes a strong case for her as the women's tennis GOAT.
Boris Becker's opinion on the matter has sparked a lively debate among tennis fans.
The discussion is likely to continue in the coming days.
The women's tennis GOAT debate is a complex one.
Several players have made strong cases for the title over the years.
Boris Becker's comments have added fuel to the fire.
The debate is sure to rage on in the tennis community.