Rubuta ci gaba don wannan sakin layi - A watan Yulin 2013, Sirotkin ya shiga kungiyar Sauber Formula One, da nufin shiga zaman Juma'a a shekarar 2013 da nufin yin gasar sa ta farko, da kuma cikakken kujerar tsere na kakar. Ya ci gaba da zama a matsayin direban gwaji a shekarar 2014. Sirotkin ya halarci gwaje-gwajen da aka yi a Bahrain a ranar 8 ga Afrilu, inda ya kammala zagaye 75 kuma ya rufe nisan sama da kilomita 300, yana yin rikodin na 8 mafi sauri. Wannan sakamakon ya ba Sirotkin damar samun Superlicence. Sirotkin ya fara tseren tseren tserensa a karshen mako a cikin horo na kyauta a 2014 Grand Prix na Rasha
inda ya rubuta sa'a ta 17 mafi sauri, kimanin kashi hudu cikin goma na biyu a hankali fiye da abokin aikinsa Adrian Sutil. Sirotkin bai sami damar kulla yarjejeniya da Sauber ba a shekarar 2015 saboda kungiyar ta canza tsarin ta gaba daya kuma ta zabi direbobi masu kudi mai kyau.