I really hope he can break Connors' consecutive QF record in slams entered - even more impressive as Rog's feat would be consecutive.
Really, it's only Lendl and Connors now that he's competing with, aside from Sampras going 10 years and 10 months in the top 10, (and that blasted 7 wimbledon) and Agassi's match wins in the ATP tour era.
He has a shot, if playing well, to match Johnny Mac's win percentage too.
Edit, just tied Agassi with at least 46 wins at all 4 slams. Lendl is two away at 48 (wimbledon and the AO).
After that, the only one left is Connors, who's the all surface champ with 59 clay wins.
He's also 9 wins at the USO from Johnny Mac, which would make him top 5 at all 4 slams. Also never has been done before. Agassi came the closest, falling 5 short of Borg at Wimbledon.
He needs 10 more wins at Wimbly and 9 more at the FO to be top 5 in all surfaces, passing Agassi at 5 (52 clay wins), and Edberg/Vilas (65 grass wins). Also never been done before.