Managerial mind games have become a permanent fixture of recent Premier League campaigns, with this season no different as Jose Mourinho continues to engage Manuel Pellegrini and Arsene Wenger in regular rounds of verbal jousting.
Wenger and Mourinho are old sparring partners in a feud dating back for the best part of a decade, but is their simmering rivalry dating back the best part of a decade the most bitter in the modern game?
GMS has looked at the fiercest grudges among top tacticians and found eight examples of rivalries that stand the test of time in terms of their intensity.
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