AC Milan’s Ruben Loftus-Cheek should have left Chelsea a lot sooner than he did. That has been suggested by Owen Hargreaves. Ruben Loftus-Cheek, who’s a product of the Blues academy, spent 19 years on Chelsea’s books before leaving last summer. AC Milan paid Chelsea a £15 million transfer fee (The Guardian) to sign Loftus-Cheek, which is already looking like a great piece of business for the Italian club. The 28-year-old midfielder is excelling during his debut season at the San Siro. He’s now up to seven goals in 28 Milan appearances after scoring twice yesterday in the Europa League. Pundit …