By Matthew Cooper Mauricio Pochettino has warned fans Chelsea are not the same team which won 21 major trophies under Roman Abramovich and that it could take years for them to get back to the top. Abramovich bought the club back in 2003 and oversaw a period of great success, before selling Chelsea in 2022 to a consortium led by Todd Boehly and Clearlake Capital after he was sanctioned by the UK government over his reported close ties Russian president Vladimir Putin. Under the new ownership, Chelsea have continued to invest heavily in players, with over £1billion already spent on new signings,…