Ilkay Gundogan has admitted to being wary of Chelsea's threat next season, insisting "everyone at Manchester City knows about Timo Werner" while also describing Blues target Kai Havertz as a better player than Michael Ballack.
Werner completed a £47.5 million ($62m) move to Chelsea from RB Leipzig in June, after another outstanding season in the Bundesliga.
The 24-year-old notched 34 goals in 45 appearances to help Julian Nagelsmann's side finish third in the German top-flight and secure a place in the Champions League quarter-finals.
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Chelsea fans will hope that Werner can have a similar impact at Stamford Bridge in 2020-21, as Frank Lampard's side look to close the gap on Liverpool and City at the top of the Premier League.