I get it, and I agree. However, a fit and focussed Marat Safin would certainly have been to RG SF several times and would have copped 2-4 clay M 1000. And, getting to the SF, there is always the chance of winning and going to the RG finals - especially if you have the skills of Safin.
Remember he went 24-4 in the clay-court season of 2000, winning Barcelona. (And, at the 2003 Barcelona final, he was leading two sets to one against Moya when he retired). Not considered a strong clay-court player, he nevertheless beat Guga Kuerten at the French Open in 1998, just missed beating Guga at the 2000 German Open final (7-6 in the fifth), which was then a Super Nine, made the French semifinals once, and bested Juan Carlos Ferrero on the dirt. In fact, he was 4-5 overall versus Ferrero on clay. You look at his clay-court record through 2004, and it shows some promise. But it was on one of those European courts in April 2005 when Marat's seemingly-revived career came to an end, although that would not be clear for another year or so.
Does anyone know exactly when and where the knee injury occurred?