The greatest disallowed goal of all time?

Barcelona defeated Napoli 5-0 in the pre-season Joan Gamper Trophy at Camp Nou on Monday, Cesc Fábregas opening the scoring and Leo Messi knocking in a 15-minute second-half hat-trick. But it could all have been so different for the Italians.

After just 10 minutes Marek Hamsik nodded across goal and Edinson Cavani sent a thunderous overhead kick past José Manuel Pinto in the Barcelona goal, rattling in the effort off the underside of the bar. The celebrations were short-lived however – Hamsik had been flagged offside in the build-up.

The Uruguayan's effort joins the ranks of the very best goals-that-never-were. Kevin Keegan's similarly acrobatic effort for Southampton against Manchester United in 1981 was ruled out by the referee, as was Cristiano Ronaldo's sensational effort for Portugal against Spain last year (blame Nani for that one).

Then there's the goals that the officials failed to spot – Gonzalo Bazan's screamer for Independiente Rivadavia that bounced back off the stanchion and, of course, Clive Allen's thumping free-kick for Crystal Palace in 1980 (as recreated by Baddiel and Skinner) – and the ones you wished were given: George Best flicking the ball away from Gordon Banks in 1971 and Peter Schmeichel's last-minute overhead kick. And then there's the whole sub-section of great near misses.

Does Cavani top the list? And which ones have we missed?