sentences:  Vietoris remains with Racing Engineering for the 2011 GP2 Series season, alongside Dani Clos.After crashing heavily during the first round of the season at Istanbul, he complained of recurring headaches and was replaced by Álvaro Parente until he recovered and returned to the cockpit in Valencia.At Spa-Francorchamps, he took his first series pole position and converted it into victory, also setting his first fastest lap in the process.