Jose Mourinho usually has a poor relationship with most rival managers, finding numerous ways to undermine the likes of Arsene Wenger, Pep Guardiola, Rafa Benitez and Manuel Pellegrini over the years.
Even Aston Villa assistant Roy Keane and the self-styled Special One are enjoying a bit of needle thanks to Mourinho's propensity to try to shake hands before the full-time whistle.
However, he was more welcoming towards Louis Van Gaal at the start of the season, having served his apprenticeship under the Manchester United manager while at Barcelona.
That may change on Sunday when Chelsea and Man United go head-to-head.
But who is winning the battle as the most searched for manager on the Internet so far?
Congrats to the new search engine champions MT @ManUtd: LVG or Mourinho? Who's the most searched-for manager? pic.twitter.com/kkVLNcNCtH
— Newstalk's Team 33 (@teamthirtythree) October 23, 2014
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