The Swede, who walked away from the sport when he was just 26 after seeing his Wimbledon reign ended by John McEnroe in 1981, hopes that the world number one doesn’t suffer the fate that struck him when he fell out of love with the sport.
“Hopefully he will not wake up one day and suddenly realize he is bored with the sport. If that happens, it will become difficult for him,” said Borg who is making only his second trip to Wimbledon in 26 years.
“Right now he looks sharp and wants to play for many more years. Everything around him is very correct, but a lot of players understood what I went through when I lost my motivation.
“It came to the point where life in tennis was not fun any more, but still I was young. If that happens, it’s difficult to continue.”
Borg could see Federer equal his record of five successive Wimbledon titles later Sunday if the Swiss master beats Rafael Nadal for the second year in a row.
The Swede insists he will be more than happy to see the record not only equalled but also bettered.
“Records are not meant to be just challenged,” Borg told the Sunday Times.
“They are there to be broken. To win five times in a row at Wimbledon is tough to beat. Pete Sampras was close: he got four in a row, then it was Roger who beat him to deny the fifth.
“Now I hope and believe he can win six, seven, or even eight times in a row, so long as he keeps the motivation.”