The former England boss has dismissed the longevity of the Portuguese manager, suggesting that his methods only work short term.
Chelsea's disappointing start to the new season is down to Jose Mourinho burning out his players, according to Fabio Capello.
The Premier League champion has been poor so far in this campaign and sits 16th, having lost more top-flight matches already this term then the club did in 2014-15.
On Monday Chelsea issued a statement backing the Portuguese boss, who saw his team fall to a 3-1 defeat at home to Southampton on Saturday.