Callum Wilson was enjoying a flying start to the 2015-16 season - his first in the Premier League - when he ruptured his anterior cruciate ligament following a tackle from Philipp Wollscheid.
Kerber has been a completely different player to the one who struggled so badly in 2017 and goes into the Australian Open as a real contender to reclaim the title she won two years ago.
Both teams were level on seven points when they met in the fourth round of Premier League matches and Jurgen Klopp believes the 5-0 loss for his side was a turning point in both clubs' campaigns.
Since completing a £37million move from Schalke to Manchester City in 2016, Leroy Sane has gone on to become one of the Premier League's most exciting talents.
Australian Nick Kyrgios has had enough of the rollercoaster ride and insists he is ready to take a more mature approach to his career ahead of the Australian Open on Monday.