Summary
It was ever thus when Arsenal boss Arsene Wenger and United manager Jose Mourinho lock horns.
The acrimony between Wenger and Mourinho stretches back to the arrival of the Portuguese coach in England 13 years ago.
Even now, with Wenger 68 and Mourinho 54, neither boss seems ready to act their age.
When Wenger took a shot at Chelsea by claiming they might have lost belief after a couple of poor results in the 2005-2006 season, Mourinho went on the offensive with a memorable, if unkind, description of the Arsenal manager.
Former Real Madrid, Inter Milan and Porto coach Mourinho has never lasted more than three years anywhere, while Wenger is in the 21st year of his Arsenal reign.
Arsenal had gone eight years without a trophy under Wenger at the point, while Mourinho was back at Chelsea having hoovered up silverware across the world.
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