New Renault team principal Eric Boullier has admitted today that the team is leaving it late to sign a second driver to partner Robert Kubica and that the choice is limited. “Today we have a situation where there are not many drivers available on the market,” Boullier told Autosport. “I speak about drivers with Formula 1 experience and drivers who are rookies but successful enough and graduated enough to get into Formula 1. The key thing is that we do consider driver performance and driver development state.” Boullier’s list has two experienced drivers and two inexperienced ones. He said that More…