Amid the complex McLaren-Renault-Toro Rosso-Honda negotiations, one part of the equation is STR's driver Carlos Sainz. Even before the engine supply issue, the works Renault team was enquiring about the young Spaniard's availability to pair alongside Nico Hulkenberg next year (and possibly even for the last few races of this season). Red Bull took up another one-year option on him in Austria this year - leading him to voice his frustration at not being able to pursue opportunities outside the Red Bull family that has backed his career to date. F1 updates straight to your phone How to receive all the latest F1 news straight to your mobile He felt that a fourth consecutive year in the junior...
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