Audi are exploring a range of options as they seek a teammate for Nico Hulkenberg. Around three and a half months on from Hulkenberg’s arrival, they’ve still yet to complete the 2025 Sauber line-up. Audi won’t officially enter F1 until 2026 when they take control of the established Swiss team. But any moves this year could effectively form their first driver lineup. The easiest option on the face of it would be to re-sign one of the current drivers. ‘Against all odds’, Audi could keep Valtteri Bottas, who’s looked set to leave for much of the year. While Zhou Guanyu is responsible for the scor…