The two coaches have continued their simmering rivalry with another trading of verbal blows over the Spaniard's time at Stamford Bridge.
The Napoli coach took temporary charge at Stamford Bridge in Nov. 2012 after the sacking of Roberto Di Matteo and guided the Blues to Europa League glory and Champions League qualification.
However, Mourinho has insisted during Chelsea's preseason that he does not want to win the secondary continental tournament, to which his former Premier League adversary has responded with a hint of venom.
"There are many coaches who talk too much to be in the limelight," Benitez told reporters.
The duo had a fierce rivalry while in charge of Liverpool and Chelsea respectively, before Benitez succeeded Mourinho as Inter boss on the back of his treble-winning success at San Siro.
But the 53-year-old endured a miserable time in Italy, as he was sacked just six months into his reign.