One Step Ahead Meaning

(idiomatic) maintaining a slight advantage; continuing to lead

Example: 2011 January 5, Jonathan Stevenson, “Arsenal 0 - 0 Man City”[1], BBC:
  Wilshere had another shot saved low down by Hart as City struggled to keep up with Arsenal's flowing forward play, the home team always appeared to be one step ahead as City boss Roberto Mancini showed his annoyance by remonstrating with his players on the touchline.