The Spaniard says the striker will stick with the Blues, while captain Gary Cahill revelled in the team performance put in against Leicester City
Marcos Alonso has dismissed suggestions that Diego Costa is looking to leave Chelsea.
Costa was not included in the matchday squad for Saturday's trip to Leicester City amid reports of a furious row with manager Antonio Conte over a back injury and suggestions the striker is the subject of a lucrative offer from the Chinese Super League.
Missing the Premier League's joint-highest scorer did not seem to hurt Conte's side too much, though, as Alonso turned a surprise two-goal hero in a 3-0 romp.