After crashing four S1000RR’s during WSBK’s stop at Phillip Island, and then missing the race entirely, Ruben Xaus hasn’t exactly put his best foot forward in the 2010 World Superbike Championship season. For some the continuation of the Spanish rider’s career on a factory supported Superbike seems to have a death clock already running, and the rumor is that Xaus has to prove his worth or risk being shown the door from the BMW WSBK team.