switching the ball to the opposite side, was a good example of how Spurs were vulnerable to quick counter-attacks. Chelsea's danger zone A theme of Chelsea's season so far has been their poor defensive work on the flanks -- the full-backs don't receive enough protection from the wide players, and Roberto Di Matteo's side have often conceded following crosses, particularly from their left-back zone. On Saturday afternoon, West Brom exploited this weakness with the use of their central players. On paper, James Morrison was nominally the central attacking midfielder but drifted across the pitch to the flanks, while Shane Long is one of the best centre-forwards in the Premier League at working the channels. Those two both moved across the pitch laterally to find space -- Morrison provided the cross for Long's opener, while the Irishman did likewise for Peter Odemwingie's winner. Whether deliberate or accidental, it was a fine example of how central players, as well as wingers, can cause opponents problems in wide zones.