Joop Zoetemelk won the worlds on Colnago in '87. I would guess that the 10 worlds equates to pro championships?
quickly looking back at world champs, from '89 there were Joop, Saronni and freddy maertens (81?) I had a lovely poster of him resplendent in his rainbow jersey and colnago.
there were also a pile of east german and soviet winners who rode Colnago's, so probably includes them.