There are various inividual skills and team tactics needed to play effective Association football. Football is in theory a very simple game, as illustrated by Kevin Keegan's famous assertion that his tactics for winning a match were to "score more goals than the opposition". However, well-organised and well-prepared teams are often seen beating teams with supposedly more skilled players, even over time. Coaching manuals and books generally cover not only individual skills but tactics as well. Several of these are explored below.