Five things we learned from the weekend fixtures, including Chelsea’s Diego Costa and Arsenal’s central midfield frustrations

Tottenham Hotspur are very dangerous under Pochettino

Tottenham Hotspur haven’t really been seen as genuine contenders for a top four finish – but the ease with which they dismantled QPR suggests that Mauricio Pochettino is having a real impact at White Hart Lane, with some flowing football and the impact of Erik Lamela particularly evident for Spurs.