LONDON, March 1 : Chelsea manager Liam Rosenior questioned his team's decision-making after they conceded twice from Arsenal's favourite routine and had a player sent off in a 2-1 defeat in the Premier League on Sunday. Rosenior had enjoyed a generally positive start since replacing Enzo Maresca and this was his first defeat in seven league games but some recurring issues again undermined Chelsea's top-five push. Both Arsenal's goals - scored by William Saliba and Jurrien Timber - came from the