Kurt Zouma has lifted the lid on life behind the scenes at Chelsea as he tries to settle in at his new club, claiming that striker Diego Costa is "very crazy" and likes to slap him around the head.
The defender joined up with his new Chelsea team-mates this summer having agreed to join the club in a £12 million deal last year before spending the 2013/14 campaign on loan with his club Saint Etienne.
The 19-year-old is yet to make his debut for Chelsea in the Premier League with both Gary Cahill and John Terry ahead of him in the pecking order, but he is likely to be given his chance to shine as boss Jose Mourinho tries to juggle the demands of competing in four separate competitions this season.
For now though he will be focused on acclimatising to life in west London - and it certainly seems as though fellow new-boy Diego Costa is helping him do just that.
Speaking in an interview with French newspaper L'Equipe, Zouma revealed that the Chelsea striker had his own way of helping him to settle, while he also had tales about Branislav Ivanovic and Mourinho.
"Diego Costa is very, very crazy. Sometimes he gives me a slap across the head and tells me: 'Go!', he joked.
"Ivanovic makes a lot of jokes too. Afterwards the group laugh a little about my age because, well, I'm a big man for 19-years-old.
"Even the coach when we were going for the blood test jokingly said, 'Here, now we'll see if you lied about your age'. But really they're cool, easy.
On the pitch Zouma admits he has been taken by surprise by the pace of the Premier League - and said he was over-awed just watching Chelsea battle to a 6-3 win over Everton at the weekend.
"They are great players that you are used to seeing on TV, taking on Playstation," he explained.
"I said almost from the outset that I can't really approach them. When you are on the field you think, 'Wow! That's how to play football'.
"It goes fast, very fast. The match against Everton was crazy. When they told me to warm up, I went so fast. It is very exciting and I was almost too keen."
Zouma hasn't been named as part of Chelsea's 25-man squad to feature in the Premier League this season, but because he is under 21 he is still eligible to play. His next appearance could well be for his country after he jetted out to link up the French national team ahead of their friendly against Spain this evening.
Chelsea will resume their Premier League campaign after the international break against Swansea at Stamford Bridge. So far they've claimed wins in each of their three league fixtures so far, and they're currently favourites to be at the top come May.