Rubuta ci gaba don wannan sakin layi - Kerber ya fara kakar 2018 tare da bayyanar farko a gasar cin kofin Hopman
, inda ta yi aiki tare da Alexander Zverev. Ba a doke ta ba a wasanninta na mutum ɗaya kuma ta taimaka wa ƙungiyar ta shiga wasan ƙarshe inda suka yi rashin nasara a Switzerland. Kerber ya bi wannan wasan kwaikwayon tare da taken farko a cikin fiye da shekara guda, a Sydney International na gaba. Don shiga wasan karshe, ta wuce Lucie Šafářová da Venus Williams, tana adana maki wasa a kan tsohon, don shiga wasan kusa da na karshe inda ta doke Dominika Cibulková. Ta kafa wasan zakarun Turai tare da tauraron gida Ashleigh Barty bayan ta wuce Camila Giorgi. A can, ta doke Aussie a cikin madaidaiciyar saiti don taken aikinta na 11. A gasar Australian Open, Kerber mai lamba 21 ya koma zagaye na huɗu tare da cin nasara a kan Anna-Lena Friedsam, Donna Vekić da kuma tsohuwar lambar 1 ta duniya Maria Sharapova, duk a cikin madaidaiciyar saiti kuma ba ta rasa wasanni sama da hudu a kowane saiti. A can, ta yi nasara a kan Hsieh Su-wei a cikin wasanni uku don matsawa zuwa wasan kusa da na karshe na biyu a nan, inda ta kawar da Madison Keys. A wasan kusa da na karshe, gwagwarmaya da lambar 1 a duniya, Simona Halep, duka suna da maki biyu a wasan na uku amma ba a canza su ba. Wasan ya ƙare 9 zuwa 7 a cikin saiti na uku, tare da Halep ya yi nasara. Bayan lokacin bazara mai ƙarfi na Ostiraliya, Kerber ya sake komawa cikin manyan 10 sau ɗaya, yana matsayi na 9 a duniya.