Chelsea's Serbian defender Branislav Ivanovic has made some frightening comments regarding £32 million striker Diego Costa.
Ivanovic claims that the lethal frontman can become even more influential for Chelsea, but only when his grasp of the English language gets better.
The 30-year-old told Chelsea's website: "He's a very nice and funny guy. He likes to make jokes and I think when he improves his English he'll have even more influence in the squad.
"He knows how to control himself very well. He never sleeps in the game, he's not quiet, he wants to be a star, and he wants to be the player around which everything happens in the game.
"It's good for the team when he's working and you can see he is always trying to win duels and look positive on the pitch. He is set up like this for the team, it's his style."
Costa, who joined Jose Mourinho's side from Atletico Madrid during the summer transfer window, has had a phenomenal start to life in the Premier League scoring 12 goals in 13 games.
His direct competitiveness and aggression have returned a certain fear-factor that had been missing from the Chelsea strike force since the departure and decline of Ivorian forward Didier Drogba.
The Spanish international's most recent form hasn't been quite as stunning though and his goal in the weekend's 2-0 win over Hull City was his first in five games in all competitions.
His Chelsea teammates and supporters will be hoping that his domestic form kickstarts again and fires them to their first league title since the 2009-10 season.