There is always a peculiar relationship between mentor and protege, as if the stakes become even higher than normal whenever they duel.
Who can forget the tactical work Jose Mourinho put in as Chelsea manager to defeat Liverpool in 2014 and ensure his former colleague Brendan Rodgers did not win the Premier League title.
Now good friends Pep Guardiola and Mikel Arteta are in direct competition to add an extra dimension to the fascinating title race between Manchester City and Arsenal.
TRENDING