The Blues agreed a deal with Ajax to sign Morocco international Ziyech in March, while Germany striker Werner secured his move to west London last month.
Ziyech and Werner became Frank Lampard’s first and second signings as Chelsea manager and officially joined the Premier League club today.
Christensen played against Werner several times during his spell in Germany and says he is more than aware of the striker’s talent.
And while he has never faced Ziyech, Christensen is also confident the 27-year-old can bring ‘good things’ to Chelsea.
‘I played against Werner quite a few times when I was in Germany so I know what he can do and what sort of player he is,’ Christensen told Chelsea’s official website.
‘I haven’t played against Ziyech but I’ve seen him a lot and I think they can both bring good things to the club.
Andreas Christensen is excited to play with his new team-mates
Andreas Christensen is excited to play with his new team-mates (Picture: Getty)
‘We’re all excited to see what they can bring.’
Werner has developed into one of the most prolific goalscorers in Europe at RB Leipzig and former Chelsea manager Roberto Di Matteo believes he is destined for success at Stamford Bridge.
‘When I was at Schalke he was at Stuttgart and he was just coming on to the scene,’ Di Matteo, who won the Champions League and FA Cup while Chelsea manager, said.
‘During the second part of the season, before I left, I was planning with my sporting director
‘I was saying I wanted to sign this guy, he’s good. He was young, quick, technically good. I said “can we not sign this boy Timo”.
‘We didn’t in the end and then I resigned and so on. Then I went to Villa. Stuttgart, the season after, they got relegated, and so I enquired again to sign him, but then Leipzig signed him on.
‘I’m a big fan of his and he’s developed really, really well as well.
‘He’s a goal scorer, he scores goals, so he can guarantee a certain amount of goals for the team, which is very good, and he’s very pacey as well, he’s fast.’