<prompt> Qedela umusho olandelayo: Isizini sika-2018 se-Angelique Kerber ithenisi saqala ngokusemthethweni ngomhlaka-30 Disemba 2017 ngokuqala kwe  <response>: IHopman Cup ka-2018. U-Angelique Kerber ungene kule sizini njengomdlali onguNombolo 21 emhlabeni. 