Werner joined the Blues from RB Leipzig earlier this summer though is not able to play for Chelsea until the new campaign.
Though that’s not stopping Frank Lampard’s new striker getting involved with Werner seen in full Chelsea tracksuit ahead of the Cup final.
He was spotted on the Wembley pitch alongside the likes of Ruben Loftus-Cheek and Tammy Abraham.
Werner will provide competition to Abraham and Olivier Giroud as the focal point of Chelsea’s attack next season.
Though Giroud insists he is not worried about his position in the squad, saying: "When the teams play a defensive way against us, it’s not bad to have a tall striker like me that can make the link. But I am not naive.
"Werner hasn’t been recruited to sit on the bench. But I will do everything I can to give headaches to the coach when it comes to making his choice.
"Werner’s transfer is an additional motivation and it was inevitable that the club recruits a striker.
"Chelsea is a great club, that spends money to strengthen the squad, and I was expecting someone to come.
"I still have a year of contract here. If I stay here afterwards, that’s fine. Otherwise, it will be another challenge.
"But I can still play in a good league for two years. I don’t set any limits."
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Werner spoke about how Blues boss Lampard was a key figure in his decision to head to Stamford Bridge.
"He (Lampard) was the main point. We talked a lot about things like system, like how he wants to play and sees me playing, and how the system fits to me," Werner told the Chelsea website.
“He's a really nice guy who not only told me what he wants from me as a player (but also) because he wants to help me."