S.Eto'o: Mourinho sometimes goes crazy © EuroFootball.com

Chelsea striker Samuel Eto'o insists that before important matches, strategist Jose Mourinho sometimes "loses his head."

On Saturday, in the English Premier League match, Mourinho's carefully prepared Chelsea team humiliated Arsenal players at home with a score of 6-0.

However, J. Mourinho has had some not so pleasant moments this season, for example, when at a sponsor event in Switzerland, he called S. Eto'o "old."

"When preparing for matches, Mourinho becomes someone else. Like every person, he sometimes goes crazy," said the 33-year-old Cameroonian.

"He proved that when he called me old, but he always takes all the pressure and responsibility upon himself.