But Verkerk or Gaudio diddn't have any great results even on clay besides that. I don't think there were flukes because there's no such thing, they diserved to win and reach the final. Cases like Costa maybe or Moya were different, because they don't have great results outside clay, but aside from their RG title they have some other achievements on clay.
Gaudio bagelled Nadal on clay
And he did win his fair share of clay court titles but Nadal hit his stride on clay the year after. He was still at a decent level in 05 and took a set off Nadal in Monte Carlo in 2006 I think it was. Shock slam winner yes but a strong clay courter.
Verkerk didn't do much besides it but knocking over both Moya and Coria was an impressive achievement, albeit it ensured a non-competitive final (JCF-Coria would have been fascinating)