He often lost to big names, sometimes in great matches. Especialy at the Open. He lost to the eventual winner every year at the Open from 91-94. In 92 he probably beats Sampras in the final had he gotten past Edberg in the semis. In 93 for sure only Sampras was stopping him of the guys who made the quarters. In 94 he definitely goes on to win the title had he gotten past that 5 setter with Agassi in the Round of 16.
He is really more of a hard courter than a clay courter despite his surprise RG triumph. Making the 95 final at RG, beating Bruguera, was a huge effort. In 96 and 97 he benefitted from Agassi's decline (and guys like Courier not even being contenders anymore) in making his various HC slam runs.