haha i see i missed some solid bitchfest
tbh i watched that serra-matosevic match and to me serra was just being awful (matosevic was a break down in the 3rd to erratic ilhan of all ppl, clearly troubles with adjusting surface) and i totally disagree it was matosevic's best match in his career
true serra kept some rallies that lasted long and that against other players they could give points, but also half of the points for matosevic were flo's unforced mistakes
i used to like watching serra, he always played so well in szczecin (challenger i used to work at for years), very entertaining game for a few years on not only challenger but even atp tour (he had atp titles!) but that's really gone for some time now...
also i dont suppose any of these players at this stage think "let's tank, i have RG Q ahead!" because players usually prefer building up the monumentum, especially at the stage where they really fight for points and money to travel to the next tournament...most or all of them play quallies anyway
only when someone doesn't feel well he could try to protect the health/energy (like clement who retired) but if someone enters the court and feels strong, i'm sure he'll fight.