He replaced Pablo Machín, who was fired after the team lost to second-to-last Leganés last weekend. Espanyol has 10 points from 18 matches. It is five points from safety. The 49-year-old Fernández recently helped Alavés escape relegation when it was in a similar position to Espanyol's. He was with Alavés until the end of last season.
Fernández's first training session in charge of Espanyol will be on Monday.
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