LONDON, Jan 17 : Chelsea beat London neighbours Brentford 2-0 on Saturday in the first Premier League match under coach Liam Rosenior thanks to a Joao Pedro strike and a Cole Palmer penalty, but they were let off the hook as the visitors wasted a string of chances. After a run of nine league games with only one win – most of which was under former coach Enzo Maresca who left the club on January 1 – Chelsea managed only two attempts on target all game with Brentford on top for much of each half.