That’s the view of current tennis world No4 Alexander Zverev.
The German is a big fan of tennis veteran Roger Federer, having idolised him growing up.
“There's no one 'perfect' in tennis,” Zverev said.
“Except maybe when we talk about Roger. You could say he's perfect.”
Federer won two Grand Slams this year with Rafael Nadal winning the other two to ensure he finished ahead of the Swiss in the world rankings for 2017.
Zverev has enjoyed his own success on the court this season, winning Masters series events in Rome and Toronto, and rising to number four in the standings following a successful 2017 season.
The 20-year-old is still yet to beat a top-50 player in the Majors but achieved his best result at Wimbledon, reaching the fourth round back in June.
On his goals for 2018, Zverev said: “I’m the world No4, therefore I hope to do better at the Slams this year.”
Zverev previously revealed Federer was his idol in August when he beat the Swiss legend to win the Rogers Cup.
“This one against Roger is something so special for me because he was always a great idol growing up for me,” he said.
“The greatest player of all time, beating him in a final, not just any final but in the final of a Masters 1000, is amazing.”