Paris: Roger Federer will undoubtedly become the greatest tennis player to have graced the sport if he wins the French Open, Andre Agassi said on Saturday.
Agassi, one of only five men to have achieved the career Grand Slam, said he expected Federer to join the select club by beating Sweden's Robin Soderling in the Roland Garros final on Sunday.
"It ends the discussion of where he fits in the history of the game," the American said during a visit to Roland Garros with his wife Steffi Graf.
"If it wasn't for (four-times champion Rafael) Nadal, he probably would have won a handful of these things. So nobody would underestimate where he deserves to fit in this game. This is going to mean so much to him, to have that hole filled. It's something he's going to earn tomorrow and I think it will change his life," said Aggasi.
If Federer completes the feat, he will join Don Budge, Fred Perry, Roy Emerson, Rod Laver and Agassi as the men who have won all four Majors.
It will also give Federer a record-equalling 14th Grand Slam crown, putting him level with Pete Sampras.
Agassi said winning the Musketeers' Cup in 1999 defined his life, even though he won seven other Major trophies during his career.
"It changed my career and as result my life," he said.
"It's probably the most profound moment in my career, getting over obstacles and doubts I had coming to win here," said Agassi, who was beaten in two finals before he completed his collection.
"Tomorrow there's a chance to see history and I think Roger being the second best clay courter over the last five years, earning a spot in the final four different times, deserves this more than I did. It would be privilege for the game to see history being made and in some ways it feels like destiny for him and it's going to be pretty exciting," he said.
"He's extraordinarily talented and talk about grace on court, watching him play is something special to see and if he does it tomorrow, he'll know what an accomplishment it was," he added.