Under the guidance of Wim Fissette, the esteemed former coach of Kim Clijsters, Kerber had recovered her ranking from No.21 back to No.3 in 2018, winning Sydney and denying Serena Williams’ bid for a record-equalling 24th Grand Slam title in the Wimbledon final.
But indifferent form and a difference in opinions prompted a split ahead of the WTA Finals in Singapore.
Kerber wanted new direction, and it was former Australian Open runner-up and fellow German, Rainer Schuettler, whom she appointed to provide that.
Despite falling to Petra Kvitova in the quarterfinals of her Sydney title defence last week, four wins from as many matches at the Hopman Cup leading in had the German quietly assured she and Schuettler were headed in the right direction.
She will meet Brazilian qualifier Beatriz Haddad Maia for a place in the third round.
“I’ve played a lot of matches already here in Australia,” Kerber said. “I'm feeling the balls good, I have my rhythm. Of course, the balls are a little bit different to the balls last year.
"But for me, I really don't care too much about balls, courts, weather. I [just] need the ball, the racquet, just try to play.”
No nonsense, no fuss. It’s the approach that has served the 30-year-old best in the past, particularly on the arena where it all began.