Arsenal forward Kai Havertz is high on confidence and loving life in north London after a difficult spell, manager Mikel Arteta said on Friday ahead of his side's Premier League clash against Wolverhampton Wanderers.
"It's super exciting for me to be joining this amazing club and to be part of the Arsenal family. This club has such a big history, and I hope we can achieve lots of things," the 24-year-old told the club website.
Chelsea, who were beaten 1-0 by Borussia Dortmund in the Champions League on Wednesday, spent more than $350 million to bring in eight players in January but did not sign a proven striker.
Conte said Wednesday's 2-0 defeat at Chelsea in the first leg of their League Cup semi-final showed how far his current club lag behind his former one.
Gundogan lost a Champions League final for the second time in his career when Premier League winners City were beaten by Chelsea.
Chelsea finished fourth in the Premier League last season, 33 points behind champions Liverpool.
Havertz has left the German national team hotel because of a "looming transfer" to the Premier League, the German Football Association said on Friday.