With Renault confirming Jolyon Palmer for 2017, Kevin Magnussen set to replace Esteban Gutierrez at Haas, Esteban Ocon reportedly on his way to Force India, and Pascal Wehrlein expected to stay put at Manor, that means there would be only three seats still up for grabs: two at Sauber, though both Felipe Nasr and Marcus Ericsson have a good chance to keep their drives, and one at Manor. Who will secure these when the music stops?