The Frenchman worked with both coaches during spells at Chelsea and Arsenal, with the now Manchester United boss considered to be the more demanding
William Gallas says he enjoyed working under Jose Mourinho more than he did Arsene Wenger, with the Portuguese more demanding of his players.
The former France international spent time with two of the finest coaching brains in the business during a playing career which took in spells at Chelsea and Arsenal.
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He first linked up with the Blues in 2001, allowing him to form part of a successful era under Mourinho – following his arrival in 2004.