Complex sentence: Van Rossem went one step further by saying on Belgian TV that he will quit F1 if the Porsche engine deal falls through, but many saw this as an admission that he was tired of the sport and a reason to get out.
Split into simpler sentences: Van Rossem went one step further by saying on Belgian TV that he will quit F1 if the Porsche engine deal falls through. Many saw this as an admission that he was tired of the sport and a reason to get out.