While you cant really decide since Roger is still playing. I think Roger will probably play a few more years and probably get one or maybe two more grand slam titles. Personnaly unless Roger wins probably 3 more titles I still think Pete was the best ever because Pete had great players to compete with during is time, such as Agassi ,Courier and Chang.. During the majority of Rogers dominance he had virtually no competition He hasnt been challenged until Nadal came along and Nadal has had his number.. You cant really count Andy Roddick. Andy is not even in the same league as aggassi or Courier . I think if you put Roger in Pete's shoes he wouldnt have had the success of Pete.