<prompt> Qedela umusho olandelayo: UKerber uqale isizini ka-2019 ngokuvela kwakhe kwesibili e-  <response>: IHopman Cup, eceleni kuka-Alexander Zverev futhi; balahlekelwe emdlalweni wokugcina eSwitzerland emdlalweni wokugcina wonyaka odlule. ESydney, uKerber wehlulekile ukuvikela isicoco sakhe ngokuhlulwa yiqhawe lokugcina uPetra Kvitová kuma-quarterfinals. Emqhudelwaneni we-Australian Open, uKerber, owaba ngowesibili ohlwini, wafika kuma-round of 16 ngokuwina amasethi alandelanayo phezu kwabadlali abanjengoPolona Hercog, Beatriz Haddad Maia owathola isicoco sakhe se-Grand Slam esingu-100 noKimberly Birrell, kodwa wahlulwa yi-semifinalist uDanielle Collins ngamasethi alandelanayo. Ngenyanga elandelayo, uKerber wafika kuma-semifinals eQatar Open lapho elahlekelwe khona yiqhawe langempela u-Elise Mertens. Emqhudelwaneni we-Dubai Tennis Championships, uKerber wahlulwa emzuliswaneni wesithathu owathatha indawo yokugcina uHsieh Su-wei ngamasethi amathathu. 