Conte was replaced at Chelsea by fellow Italian Maurizio Sarri who has also fired by the club after 63 games.
Conte is now managing Italian club Inter Milan.
Despite the massive payouts Chelsea have proved successful since Abramovich brought the club. They have won five Premier League titles since 2004, five FA Cup trophies a Champions League and two Europa League titles.
Chelsea's reported pay-offs under Abramovich
Maurizio Sarri (July 2019): Nothing
Antonio Conte (July 2018): £26.6m (incl staff and legal fees; Conte got £9m)
Guus Hiddink (May 2016): Nothing
Jose Mourinho (Dec 2015): £8.3m (incl staff)
Rafael Benítez (May 2013): Nothing
Roberto Di Matteo (Nov 2012): £10.7m
Andre Villas-Boas (March 2012): £12m
Carlo Ancelotti (May 2011): £6m
Luiz Felipe Scolari (Feb 2009): £12.6m
Avram Grant (May 2008): £5.2m
Jose Mourinho (Sept 2007): £23m (incl staff)
Claudio Ranieri (May 2004): £6m