For one so young, Robben possesses a remarkable maturity and not just in terms of his prematurely receding hairl i ne. His pace, movement and lightening-quick feet give Chelsea an added dimension, with even the quick-witted Damien Duff appearing sluggish by comparison. The pair switched flanks with almost dizzying frequency to great effect last night, proving beyond all doubt that two left-footed wingers can play in the same team.