Originally Posted by tudwell
I don't know about that. He's got Djokovic to challenge him at the Australian, Nadal who he would never beat at the French (and if he did, Federer and Djokovic are still above him), and he'd most likely not be able to luck out and play a headcase like Goran in a Wimbledon final. It's likely he wouldn't win the career slam and possible he wouldn't win a single slam off hard court (although it's also possible he would). His success at the U.S. Open would probably increase, though. No one's been dominant there since Federer's begun to decline, so Agassi wouldn't run into a Sampras-caliber player time and time again like he did in his real career.
With Federer past his prime and except for this past Wimbledon generally sucking on grass since 2009 (and even at this past Wimbledon he was lucky for it not to turn into another disaester with a loss to Benneteau had Benneteau not choked) prime Agassi would have real chances at Wimbledon each year. He would be just as strong as Nadal had he ever gotten to play on todays slowed grass, and in his prime he is definitely a better grass courter than Djokovic or Murray.