Mercedes team boss Toto Wolff faces a conundrum. In Hungary last weekend, he confirmed it's a toss-up between incumbent Valtteri Bottas and reserve driver Esteban Ocon as Lewis Hamilton's team-mate next year.
The decision is about more than just potentially making or breaking the careers of the two drivers. Either way, it will have a profound impact on the shape, and potential success, of the Mercedes team, not just next year, but beyond.
It's not a straightforward choice, so it's no surprise Wolff is "wrestling with himself". Both Bottas and Ocon are proven, quality Formula 1 performers and would at worst do a decent job for the Silver Arrows next year. But they are at different stages of their careers, with different skillsets, and by drilling down into their strengths and weaknesses - as well as the wider context of the team's future - we can understand the complexity of the decision Wolff faces as he battles with the conflicting paths.